Kit of parts for durable functional toys

Abstract

The invention regards a kit of parts for a functional toy, comprising: - one or more foam elements comprising at least one planar surface, the surface comprising at least one channel opening configured for receiving a first end of a connector, the channel extending perpendicular to the planar surface, wherein the 5 channel is defined by a channel wall comprising one or more axially oriented ribs, - one or more elongated connectors having a first end, a second end, a radially extending flange between the two ends, the flange configured as a stopper for the insertion of the first end into the channel opening, wherein the connector comprises one or more transversely oriented ribs, and10 wherein the kit of parts is configured such that when the first end of the connector is inserted into the channel opening to the stopper position, the at least one transversely oriented rib of the connector is frictionally engaged with the at least one axially oriented rib of the channel wall.

Description

[0001] P7326PC00

[0002] 1

[0003] Kit of parts for durable functional toys

[0004] Technical field

[0005] The present invention relates to a kit of parts for a functional toy and a functional toy.

[0006] Background

[0007] Solid foams are a popular material for toys due to their physical and mechanical properties, including resilience, low hardness, pliability, elasticity, and light weight. Thus, elements of solid foam tolerate and are easily handled by children, and at the same time have a low risk of being harmful or breaking during handling or play. Furthermore, depending on the purpose of the toy, the physical and mechanical properties of the solid foam may be tailored by choosing the type of the solid foam.

[0008] Functional toys are designed to stimulate and develop a child’s skills, such as the imagination and spatial intelligence, the fine motor-, and the gross motor strength and skills. An example of functional toys are construction toys or toy building sets, where parts are detachably attached to each other to form variable constructions that may be disassembled and reassembled to further constructions.

[0009] WO 2019 / 193157 discloses a kit of parts for versatile functional toys.

[0010] Summary

[0011] The present disclosure relates to a kit of parts for a functional toy, the kit providing building elements comprising foam elements and elongated connectors to be detachably assembled. Accordingly, the building elements form a construction toy or building set, where the parts are detachably attached to each other to form flexible and versatile constructions that may be disassembled and reassembled to the same or further different constructions.

[0012] The foam elements comprise a surface with at least one channel opening, thus defining a channel within the foam element, configured for receiving a first end of the elongated connector. Preferably, the foam element comprises two or more surfaces and with one or more channel openings, and optionally the channels are through-going, such that they extend from a first surface of the foam element to the opposite surface of the foam element. Accordingly, the foam element may comprise channels that are intersecting P7326PC00

[0013] 2 each other and / or channels that are not intersecting other channels. This facilitates that the foam elements may be assembled in a variety of ways to form flexible and versatile constructions.

[0014] The shape of the foam element channels and the connectors are configured to facilitate improved robust connections and more durable connections on repeated assembly and disassembly, such that a functional toy with improved stability and durability may be obtained.

[0015] More robust and durable connections may be obtained by foam elements comprising channels with channel walls comprising one or more axially oriented ribs, and the connectors comprising one or more transversely oriented ribs, such that when the connector is inserted into the channel, the power and / or strength of assembly primarily results from the frictional engagement between the transversely oriented ribs of the connector and the axially oriented ribs of the channel wall. It is found that the frictional engagement between the axially oriented and transversely oriented ribs may provide more stable connections as well as specifically more durable connections on repeated use and assembly. The ribs further have the advantage of providing a more smooth and less jerked assembly, and to provide a tactile feedback on complete assembly and / or disassembly.

[0016] A first aspect of the disclosure relates to a kit of parts for a functional toy, comprising: one or more foam elements comprising at least one planar surface, the surface comprising at least one channel opening configured for receiving a first end of a connector, the channel extending perpendicular to the planar surface, wherein the channel is defined by a channel wall comprising one or more axially oriented ribs, one or more elongated connectors having a first end, a second end, a radially extending flange between the two ends, the flange configured as a stopper for the insertion of the first end into the channel opening, wherein the connector comprises one or more transversely oriented ribs, and wherein the kit of parts is configured such that when the first end of the connector is inserted into the channel opening to the stopper position, the at least one transversely oriented rib of the connector is frictional ly engaged with the at least one axially oriented rib of the channel wall. P7326PC00

[0017] 3

[0018] The kit may comprise multiple foam elements and a sufficient number of connectors to be assembled into one or more functional toys. Thus, depending on the number and shapes of the foam elements, the building elements may be assembled to a functional toy of variable shape and size. Advantageously, the kit comprises one or more disc or wheel shaped foam elements configured to be rotatably assembled to a connector, such that the connector may function as a rotation shaft. Preferably, a part of the connector is configured as a rotational shaft. Accordingly, the functional toy may be a rolling vehicle, such as a children’s walker.

[0019] A second aspect of the disclosure relates to a functional toy comprising the kit of parts according to the first aspect.

[0020] In a preferred embodiment, the kit of parts are configured to be detachably assembled to a functional toy selected from the group of: children’s walker, push along wagon, children push and ride-on toys, wheel toys, rocking horse, and aid for crawling, standing, rolling, jumping, climbing, and balance training unit.

[0021] Description of Drawings

[0022] The invention will in the following be described in greater detail with reference to the accompanying drawings.

[0023] Figure 1 shows an embodiment of the assembly of the kit of parts in perspective view, where the kit comprises three building elements: two block or cuboid foam elements to be connected by an elongated connector, where (A) shows the kit before complete assembly, and (B) shows the kit after complete assembly.

[0024] Figure 2 shows an embodiment of the connected foam elements in Figure 1 , including the inserted elongated connector, in a cross-sectional view.

[0025] Figure 3 shows embodiments of functional toys assembled from the kit of parts according to the present disclosure, where the functional toy may be A) for rolling, (B) for rocking, (C) for standing, (D) for climbing, crawling, balancing, and / or jumping, E) a baby / children’s walker, F) a push and pedal ride-on.

[0026] Figure 4 shows an embodiment of the assembly in close-up, where (A) shows a perspective view of a first surface 4a of a foam element immediately prior to receiving the first connector end 2a, and (B) shows a perspective cross sectional view of the first connector end being complete inserted in the channel opening 5, which is a channel with intersecting channels 5b. P7326PC00

[0027] 4

[0028] Figure 5 shows an embodiment of the assembly in a cross sectional view, where the first connector end 2a is complete inserted in the channel opening 5, which is a channel with intersecting channels 5b.

[0029] Figure 6 shows an embodiment of a first end 2a of an elongated connector, where the flange and second end is omitted for clarity. A) shows the connector in perspective view. B) shows the end flange of the connector, which may include a logo made visible and / or tangible by a different roughness or polishing degree, e.g. a roughness of CH 0. C) shows a longitudinal cross sectional view of the connector, and D) shows a transverse or a radial cross sectional view of the connector, including exemplified dimensions indicated by arrows.

[0030] Figure 7 shows further embodiments of the connector in Figure 6 in longitudinal cross sectional view, including exemplified dimensions, e.g. diameters (0). The outer surface of the first connector end 2a may have a roughness adapted for handling and tactile feedback, e.g. a roughness of CH 28. The first connector end may comprise a radial groove 8 such that the connector may be configured as a rotational shaft, where the radial groove has a lower roughness of e.g. CH 0.

[0031] Figure 8 shows an embodiment of a first end 2a of an elongated connector, where the dimensions are further configured for a rotational shaft. As in Figure 6, the flange and second end is omitted for clarity. A) shows the connector in perspective view, and B) shows a longitudinal and a radial cross sectional view.

[0032] Figure 9 shows further embodiments of the connector in Figure 8 in longitudinal cross sectional view, including exemplified dimensions. The outer surface of the first connector end 2a may have a roughness adapted for handling and tactile feedback, e.g. a roughness of CH 28. The first connector end may comprise a radial groove 8 such that the connector may be configured as a rotational shaft, where the radial groove has a lower roughness of e.g. CH 0.

[0033] Figure 10 shows an embodiment of a foam element with a cuboid shape, where the top and bottom surfaces of the cuboid comprises 5 through-going channel openings, and the lateral faces of the cuboid comprises 2 through-going channel openings, where the channel openings are configured such that the middle channel opening of the top surface is without intersecting channels, and the other channels are intersecting. A) shows the cuboid in perspective view. B) shows a close-up of a cuboid surface, which may comprise a 1 mm countersinking along all edges. C) shows a cross sectional view of a channel opening without intersecting channels, and D) shows a channel opening with intersecting channels, including exemplified dimensions indicated by arrows. P7326PC00

[0034] 5

[0035] Figure 11 shows an embodiment of the top surface of the cuboid in Figure 10. Figure 12 shows embodiments of the lateral faces of the cuboid in Figure 10. Figure 13 shows an embodiment of a foam element with a prism shape in the form of an angled block, where the planar surfaces comprise respectively 1 or 2 channel openings. A) shows the block in perspective view. B) shows a cross sectional view of a channel opening including, and C) shows an embodiment of the bottom surface including exemplified dimensions indicated by arrows.

[0036] Figure 14 shows embodiments of the angled lateral sides of the prism in Figure 13. Figure 15 shows embodiments of the rectangular sides of the prism in Figure 13. Figure 16 shows an embodiment of a foam element with a half cylinder shape, where the planar surfaces comprises respectively 2 and 8 openings, and the cylindrical curved surface comprises 8 openings. A) shows the block in perspective view. B) shows a cross sectional view of a channel opening without intersecting channels, and C) shows a channel opening with intersecting channels, including exemplified dimensions indicated by arrows and curvature (R).

[0037] Figure 17 shows an embodiment of the planar bottom surface of the half cylinder in Figure 16.

[0038] Figure 18 shows a cross sectional view of the half cylinder in Figure 16 seen in A) the longitudinal cross section, and in B) the transverse cross section.

[0039] Figure 19 shows an embodiment of a foam element with a complex shape in the form of a curved cuboid, where the planar surfaces comprise respectively 0, 4, and 18 openings, and the curved surface comprises 18 openings. (A) shows the block in perspective view. B) shows a cross sectional view of a channel opening without intersecting channels, and C) shows a channel opening with intersecting channels, including exemplified dimensions indicated by arrows.

[0040] Figure 20 shows an embodiment of the planar bottom surface of the complex shaped element in Figure 19.

[0041] Figure 21 shows a cross sectional view of the foam element in Figure 16 seen in A) the transverse cross section, and in B) the longitudinal cross section.

[0042] Detailed description

[0043] The invention is described below with the help of the accompanying figures. It would be appreciated by the people skilled in the art that the same feature or component of the device are referred with the same reference numeral in different P7326PC00

[0044] 6 figures. A list of the reference numbers can be found at the end of the detailed description section.

[0045] Functional toy

[0046] The kit of parts according to the present disclosure may be assembled, disassembled and re-assembled into a variety of functional toys suitable for stimulating and enhancing the gross motor development of children in different age groups and with different motor skills. Thus, the kit of parts provide a versatile functional toy with a variety of assembled structures, having a variety of functions, and which can be adapted to the motor skills of children with different age and motor skills development.

[0047] Figure 3 illustrates embodiments of the kit assembled to different functional toys. For children learning to crawl, stand, and walk, the parts and the kit of parts may be assembled as illustrated in respectively Figures 3C-E. For children possessing and developing more advanced motor skills, the parts and the kit of parts may be assembled as a toy for rolling (Figure 3A), a rocking horse (Figure 3B), a toy for climbing, balancing, and / or jumping (Figure 3D), a push and pedal ride-on (Figure 3F), or similar wheel toys, such as a balance bike, and push along bike.

[0048] In an embodiment of the disclosure, the kit of parts is assembled into a functional toy selected from the group of: children’s walker, push along wagon, children push and ride-ons (i.e. ride-on toys), wheel toys, rocking horse, and aid for crawling, standing, rolling, jumping, climbing, and balance training unit.

[0049] The kit of parts according to the present disclosure may provide functional toys with improved robustness and stability of the assembled construction, as well as more durable constructions on repeated assembly and disassembly. Further, the parts are advantageously made of environmental friendly materials, such that the functional toys are both reliable and safe to use.

[0050] Assembly and disassembly

[0051] Figure 1 shows an embodiment of the assembly of a kit of parts or elements from a kit of parts in perspective view, and Figure 2 shows the assembly in cross sectional view. The embodied kit of parts 1 comprises an elongated connector 2, shown as a cylindrical elongated connector in Figures 1-2, and two identical cuboid foam elements P7326PC00

[0052] 7

[0053] 4 to be connected along a contact surface 5c between adjacent planar surfaces. Figure 1 A shows the elements before complete assembly, where a first end 2a of the elongated connector is received in a channel opening 5 at the top surface 4a of the lower cuboid foam element 4. The second end 2b of the elongated connector may subsequently be received in a channel opening 5 at the bottom surface 4b of the upper cuboid foam element 4, whereby a contact surface 5c between the adjacent planar surfaces 4a, 4b of the cuboids is obtained, providing a stable and robust assembled larger cuboid on complete assembly, as shown in Figure 1 B and 2.

[0054] Optionally the foam elements 5 are cuboids, as illustrated in Figures 1-2, where each planar surface 4a, 4b comprises two or more cylindrical channel openings 5 extending perpendicular to the planar surface comprising the channel opening. The cylindrical openings may be through-going, meaning that a channel extends from a first planar surface 4a of the cuboid foam element to the opposite planar surface 4b of the cuboid foam element, as most clearly seen in the cross sectional view of Figure 2. It follows that the channels extending from a top or bottom surface of the cuboid may be configured to intersect with the channels extending from the lateral faces or surfaces of the cuboid, and that the intersection is perpendicular for the cuboid. Accordingly, the foam elements may comprise channels configured to be without intersecting channels 5a, and channels configured to be intersection channels 5b, as e.g. seen in Figure 2.

[0055] The elongated connector comprises a radially extending flange 3 located between the first connector end 2a and the second connector end 2b. Optionally the radial flange may be a planar circular flange located at the middle of the connector, such that the first and second connector ends are identical and symmetrical, as shown Figure 2. The radial flange may thus be configured as a stopper for the insertion of the connector into the channel opening. For example, a flange having a larger diameter than the channel opening is configured as a stopper for the insertion. Thus, when a connector end 2a is inserted into a channel opening, and the radial flange 3 contacts and abuts the surface 4a of the foam element, the connector is fully inserted and in a stopper position, as shown in Figure 1A.

[0056] After the first connector end 2a is inserted to the stopper position in a first foam element 4, the second connector end 2b may be inserted to the stopper position in a second foam element 4 where the radial flange also contacts and abuts the surface 4b P7326PC00

[0057] 8 of the second foam element, as sketched in Figures 1B and 2. The neighbouring foam elements thereby become connected or assembled, and in the connected configuration, the radial flange abuts the adjacent surfaces of the neighbouring foam elements. Depending on the size and shape of the flange, there may be a gap between the adjacent surfaces of the neighbouring foam elements, such that the contact surface 5c comprises a gap. For foam elements with adjacent planar surfaces, the width of the gap may be defined by the thickness of the radial flange. To improve the stability and robustness of the assembly, and for safety reasons and hygienic reasons, it is advantageous that the gap between the adjacent surfaces is as small as possible. Advantageously, adjacent contacting planar surfaces are abutting with substantially no gap, thus providing stability, robustness, and ensuring that dirt and body parts cannot be trapped within the gap.

[0058] To reduce the gap at the contact surface 5c, the surface of the foam elements may comprise a recess 5d around the channel opening 5 adapted to receive and match a first side of the radial flange, such that the contact surface comprises substantially no gap. For example, the recess 5d may be cone shaped, as shown in Figure 5, and thus adapted for receiving a flange with a double cone shape. Advantageously, the adjacent surfaces of the foam elements are essentially planar, apart from the recess, such that the planar surfaces are completely abutting with a gap below 1 mm, such as 0 mm. It follows that the recess may have any shape adapted to receive and match a first side of the radial flange, including a cubic shaped recess matching a cubic radial flange, a half cylindrical recess matching a half cylindrical radial flange, or a spheric recess matching a spheric radial flange.

[0059] In an embodiment of the disclosure, the foam element comprises a recess around the channel opening configured for receiving a first side of the flange. In a further embodiment, the recess has a shape selected from the group of: disk, cone, truncated cone, cubic, half cylindrical, spheric, and any combination thereof.

[0060] In an embodiment of the disclosure, the recess is configured such that when the first connector end is received within a first channel opening of a first foam element, and the second connector end is received within a first channel opening of a second foam element, the contact surface of the first and second foam elements is abutting. P7326PC00

[0061] 9

[0062] In an embodiment of the disclosure, the at least one surface is essentially planar and configured such that when the first connector end is received within a first channel opening of a first foam element, and the second connector end is received within a first channel opening of a second foam element, the contact surface of the first and second foam elements is abutting. In a further embodiment, the contact surface of the first and second foam element is essentially abutting with a gap below 1 mm, more preferably below 0.5 mm, such as 0 mm.

[0063] In an alternative or further configuration, the gap at the contact surface 5c may be reduced by flange countersinking into the abutting surfaces of the foam elements. For example, for a connector end inserted to the stopper position, where the flange is abutting the surface, a further force may be applied to the connector in the direction of insertion, i.e. in the longitudinal direction of the elongated connector, which may result in the radial flange becoming countersunk into the abutting surface. The further force applied to the connector in the direction of insertion, may result in the flange of the connector elastically deforming the surface of the foam element, in particular the part of the surface adjacent and / or surrounding the channel opening. The deformation will typically be provided upon application of a suitable amount of force to the connector in the direction of insertion, e.g. a force applied perpendicular to a planar surface of the foam element. The result is that a connector flange can be countersunk in the foam element surface.

[0064] When assembling two foam elements, as shown in Figures 1-2, the further force may for example be obtained by simply pressing the neighbouring foam elements together. Thus, upon application of a further force, the flange of the connector is countersunk equally into the surface of the top and bottom foam element, and may remain countersunk after the further force is removed depending on the frictional force between the connector and the opening.

[0065] When the further force is removed, the radial flange may remain countersunk in the foam element, due to the frictional force between the connector and the channel opening and / or the frictional force at the interface between connector and channel wall. Thus, the frictional force, or resistance, between the inserted connector and the foam element channel will determine the amount of force needed to assemble and disassemble the kit. P7326PC00

[0066] 10

[0067] The frictional force between the fully inserted connector and the foam element channel opening will depend on several factors including: foam element material, connector material, the interface structure between the foam and connector, such as the morphological structure or roughness of the foam surface and connector surface, the size of the interface, i.e. the amount of surface area of the connector in contact with the foam, the shape of the connector, and the shape of the foam opening. Further inherently, the frictional force for assembling / disassembling the kit will further depend on the number of connectors used for connecting a foam element.

[0068] Advantageously, the frictional resistance is adapted such that assembly, including countersinking of the flange, and disassembly is possible with two hands and no further tools, and optionally adapted to assembly and disassembly by children, and furthermore the frictional resistance should be sufficient to provide sufficient stability to the assembled structure. Thus a suitable force for the assembly, including countersinking of the flange, and disassembly of the kit is between 20-80 N (newton), and preferably is ca. 60 N. Further advantageously, the suitable force is in a range, where the foam element surface is not permanently deformed, but only elastically deformed, when the connector flange is countersunk into the foam surface.

[0069] In an embodiment of the disclosure, the suitable force is configured to be below 80 N, more preferably below 75, 70, 65 N, and most preferably below 60 N. In a further embodiment, the connector is countersunk into the surface of the foam element by elastic deformation of the foam element.

[0070] Accordingly, a contact surface comprising substantially no gap may be obtained by configuring the assembling force needed, with the deformation properties between the foam and the radial flange, and the frictional force between the connector and the channel opening.

[0071] Advantageously, the foam is configured to be resilient and elastically deformed or compressed upon contact with the radial flange and application of a suitable amount of force to the connector. Accordingly, upon removal of the connector flange, the deformation or compression force is removed, and the resilient foam will resume the P7326PC00

[0072] 11 unloaded shape. Thus, by configuring the deformation properties, adjacent planar surfaces abutting with substantially no gap may be obtained.

[0073] The deformation properties of a foam element will depend on the foam material properties, such as the hardness, the microstructure of the foam, as well as the manufacturing process. Table 1 shows a hardness rating scale, which is applicable for solid foams. The hardness may be measured based on the method of JIS S 6050 SRIS-0101 (GS-701 N).

[0074] Table 1. Hardness rating scale.

[0075] A 1020 30405060 70 8090 100

[0076] Solid foam materials of EVA copolymers (i.e. ethylene-vinyl acetate, also known as poly (ethylene-vinyl acetate)) and / or EPP monopolymers (expanded polypropylene) have advantageous deformation properties. EVA foams and / or EPP foams may be configured to be resilient, elastically deformable or compressible, at the same time as having a high hardness, and is furthermore ecofriendly materials.

[0077] In an embodiment of the disclosure, the foam material is selected from the group of: EVA copolymers and / or EPP monopolymers. In a further embodiment, the foam material has a hardness rating above about 0020, more preferably above about O 20, and most preferably above about 10, 20, 30, 40, 45, or 50 on the Shore C scale, where the hardness is based on the method of JIS S 6050 SRIS-0101 (GS-701 N).

[0078] The frictional force between the connector and the foam element opening will also depend on the foam element material, and the contact interface structure between the foam and the connector, which again will depend on the morphological structure or roughness of the foam surface. The morphological structure of a foam element surface depends on the manufacturing process. Advantageously, the foam elements and foam P7326PC00

[0079] 12 element openings are manufactured by a mechanical cutting process. Due to the cutting process, the foam elements may have a higher surface roughness or texture. This is in contrast to foams produced by casting or molding (e.g. via a mold), where the molded foam element may have no or insignificant surface roughness or texture, if the surface of the molded foam element is smooth with no / limited open cell structures or pores. In addition, surface roughness may be introduced and / or reduced by postpolishing of the foam elements. For example, for a foam element made by moulding, one or more surfaces and / or channels of the foam elements may be configured to have a roughness of MLS1264 (cf. Figure 11, 13B, 17), where MLS refers to a standard of the surface texture. The surface roughness of the foam elements further has the advantage of facilitating handling, assembly, and disassembly of the foam elements, as well as increasing the robustness of the foam elements.

[0080] In an embodiment of the disclosure, the shape of the foam elements is obtained by casting, molding, and / or a mechanical cutting process, such as stamping, punching, and / or blade cutting, and preferably is obtained by molding.

[0081] The deformation properties of a foam element may also depend on other properties than the foam material and hardness, such as density, elongation, tensile strength, tear strength, and compression strength.

[0082] Advantageous deformation properties may be obtained with foam materials having a density in the range of 100 kg / m3based on method of ASTM D3575. In an embodiment of the disclosure, the foam material has a density between 50-200 kg / m3, more preferably between 75-150 kg / m3.

[0083] Advantageous deformation properties may be obtained with foam materials having an elongation in the range of 86% based on method of ASTM D3575. In an embodiment of the disclosure, the foam material has an elongation between 60-95%, more preferably between 70-90%.

[0084] Advantageous deformation properties may be obtained with foam materials having a tensile strength in the range of 1474 kPa based on method of ASTM D3575. In an embodiment of the disclosure, the foam material has a tensile strength between 1200- 1600 kPa, more preferably between 1300-1500 kPa. P7326PC00

[0085] 13

[0086] Advantageous deformation properties may be obtained with foam materials having a tear strength in the range of 7.06 N / mm based on method of ASTM D3575. In an embodiment of the disclosure, the foam material has a tear strength between 5-10 N / mm, more preferably between 6-9 N / mm.

[0087] Advantageous deformation properties may be obtained with foam materials having a 25% compression strength in the range of 182 kPa based on method of ASTM D3575. In an embodiment of the disclosure, the foam material has a 25% compression strength between 150-210 kPa, more preferably between 160-200 kPa.

[0088] Foam elements

[0089] The foam elements may also be referred to as building elements. The versatility of the kit of parts, and the number of structures that can be build, will depend on the foam element shapes and the number and positions of the channel opening. For example, a cylinder may be built by assembling two half cylinders, and a complex prism may be obtained by assembling a cuboid and a triangular prism, as indicated in Figure 3. To further improve the versatility, a foam element configured as a wheel is advantageous. Thus, preferably the kit comprises one or more foam elements having a disc shape and being configured as a wheel. For example, the disc shaped foam element may comprise a concentric opening adapted for receiving a rotational shaft, as shown in Figure 3E.

[0090] In an embodiment of the disclosure, the foam element shape is selected from the group of: cube, cuboid, square prism, prism, cylinder, half cylinder, cone, pyramid, disc, and any combinations thereof. In a further embodiment, the foam element shape is a disc configured as a wheel.

[0091] The frictional force for assembling / disassembling neighbouring foam elements increases with the number of connectors used for connecting the neighbouring foam elements at the contact surface. For example, if the cuboids shown in Figures 1-2 are assembled using two connectors instead of one, a higher frictional force is obtained. P7326PC00

[0092] 14

[0093] In an embodiment of the disclosure, at least one surface of the foam element comprises 2 or more channel openings, such as 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 channel openings.

[0094] To further improve the versatility of the kit, it is advantageous that each foam element can be connected at one or more of the surfaces. This may for example be obtained by the foam element comprising through-going channels, where the channel opening extends from a first surface of the foam element to the opposite surface of the foam element, as shown in e.g. Figure 2. Optionally, the foam element comprises at least two planar surfaces, and may be a cuboid as shown in Figures 10-12, or a prism as shown in Figures 13-15. Accordingly, the channel opening and channel may advantageously extend perpendicular to the planar surfaces, for easy assembly.

[0095] In an embodiment of the disclosure, the at least one channel opening extends from a first surface of the foam element to the opposite second surface of the foam element, optionally wherein the first and second surfaces are essentially planar surfaces, further optionally comprising a recess.

[0096] However, a foam element may alternatively or additionally comprise curved surfaces, such as for a half cylinder surface as shown in Figures 16-18, or a complex shape as shown in Figures 19-21. In this case, the channel opening and channel may advantageously extend perpendicular to the opposite planar surface, such as the base plane of the half cylinder as shown in Figures 16A and 18B, or the base plane of the complex shape as shown in Figures 19A and 21A.

[0097] Channels and channel openings

[0098] The frictional force between the fully inserted connector and the foam element channel opening will depend on several factors including: foam element material, connector material, the interface structure between the foam and connector, such as the morphological structure or roughness of the foam surface and connector surface, the size of the interface, i.e. the amount of surface area of the connector in contact with the foam, the shape of the connector, and the shape of the foam opening.

[0099] It is found that more robust connections and more durable connections on repeated assembly and disassembly, may be facilitated by foam elements comprising channel P7326PC00

[0100] 15 openings and channels defined by a channel wall 6 comprising one or more axially oriented ribs 6.1, disposed on the channel wall in parallel with the channel length, as indicated in perspective view in Figure 4B and in cross sectional view in e.g. Figure 10C. The robustness and durability of the connection may further depend on the number of axially oriented ribs, and the special distribution of the ribs. Advantageously, the channel wall comprises between 2-20 axially oriented ribs, such as 10 ribs, that are spaced apart at a predefined distance around the wall perimeter, such that they form a rotational symmetric pattern, as shown in Figure 10C.

[0101] In an embodiment of the disclosure, the channel wall comprises between 2-20 axially oriented ribs, more preferably between 4-18, and most preferably between 6-16, such as 8, 10, 12, or 14 axially oriented ribs. In a further embodiment, the axially oriented ribs are spaced apart at a predefined distance. In a further embodiment, the axially oriented ribs are spaced apart in a rotational symmetric pattern.

[0102] The robustness and durability of the connection may further depend on the size and shape of the axially oriented ribs 6.1. For example, the height of the axially oriented ribs, as measured from the tangential plane of the channel wall, may advantageously be 2 mm ± 0.5 mm, as exemplified by the dimensions in Figures 10C-D. The height of the axially oriented ribs may further decrease along the channel length and towards the channel opening, such that the height is lower at the channel opening, which may facilitate robust and durable insertion of the connector.

[0103] In an embodiment of the disclosure, the height of the axially oriented ribs is between 1- 4 mm ± 0.5 mm, more preferably between 1.5-3 mm ± 0.5 mm, such as 2 mm ± 0.5 mm. In a further embodiment, the height of the axially oriented ribs varies along the axial direction. In a further embodiment, the height of the axially oriented ribs is lower at the channel opening.

[0104] To further facilitate insertion of the connector, and to provide a more robust and durable connection, the axially oriented ribs 6.1 may have a cross sectional shape that is circular or semicircular, as shown in e.g. Figures 10C-D. P7326PC00

[0105] 16

[0106] In an embodiment of the disclosure, the cross sectional shape of the axially oriented ribs are selected from the group of: squared, rectangular, triangular, circular, semicircular.

[0107] The frictional force between the inserted connector and the channel wall of the foam element may further depend on the relative dimensions of the connector, flange, and foam element opening. To improve the frictional force, the contact area between the connector and channel wall may be made larger. If for example, the shape of the channel opening is identical to the shape of the connector end to be inserted into the opening, then the contact area between the connector and channel wall may depend on the relative cross sectional dimensions. For example, the channel and connector may both be essentially cylindrical, and the contact area may then be increased or decreased if the channel opening has a smaller or larger cross sectional diameter than the connector. For example, the opening may be cylindrical with a cross sectional diameter of 32.5 mm (without the ribs) or 30.5 mm (including axially oriented ribs), and the connector end may be cylindrical with a cross-sectional diameter of 32 mm, as shown in Figures 7A and 10C-D.

[0108] In an embodiment of the disclosure, the cross-sectional shape of the at least one channel opening is identical to the cross-sectional shape of a connector end. In a further embodiment, the shape of the channel is essentially cylindrical and the connector end is essentially cylindrical. In a further embodiment, the channel opening has a cross-sectional size dimension, which is smaller or larger than the cross- sectional size of the connector end. In a further embodiment, the channel opening has a cross-sectional size dimension, which is at least 0.2, 0.3, 0.4, or 0.5 mm smaller or larger than the cross-sectional size of the connector.

[0109] To facilitate flexible and easy assembly, as well as robust and durable connections, the channels of the foam elements are advantageously cylindrical, as shown in Figures 4- 5, such that the channel openings may be through-going and identical on opposite surfaces. Figure 4A shows a perspective view prior to inserting a first connector end 2a into a first surface 4a of a foam element. To simplify the Figures, the flange and second connector end has been omitted. Figure 4b shows a perspective cross sectional view of the first connector end being complete inserted in the channel opening 5, and Figure 5 shows the connected assembly in a cross sectional view. P7326PC00

[0110] 17

[0111] In an embodiment of the disclosure, the shape of the channel is cylindrical. In a further embodiment, the channel diameter is constant along the channel length. In an embodiment of the disclosure, the diameter of the channel is between 20-45 mm, more preferably between 25-40 mm, and most preferably between 30-35 mm, such as 32.7 mm ± 0.5 mm or 32.5 mm ± 0.5 mm.

[0112] To further improve the flexible assembly of the elements in variable constructions, the channels extending from different surfaces of the foam element may be configured to be intersecting. For example, for the cuboid shown in Figures 4-5, the channels 5b extending from a top or bottom surface of the cuboid may be configured to intersect with the channels extending from the lateral faces or surfaces of the cuboid, and the intersection is further configured to perpendicular.

[0113] In an embodiment of the disclosure, the foam element comprises at least two surfaces, each surface comprising at least one channel opening defining a channel, wherein the channel opening is configured for receiving a first end of a connector. In a further embodiment, the channels are configured for intersecting each other, optionally configured for perpendicular intersection.

[0114] Since a channel with an intersecting channel may be considered as a venturi tube, having a lower pressure from the surroundings at the intersection due to the absence of channel wall, then the diameter of a channel with intersecting channels may be smaller than the diameter of a channel without intersecting channels. This is e.g. indicated by the exemplified diameters in Figures 10C-D.

[0115] In an embodiment of the disclosure, the diameter of a channel with intersecting channels is smaller than the diameter of a channel without intersecting channels. In a further embodiment, the diameter of a channel with intersecting channels is at least 0.2, 0.3, 0.4, or 0.5 mm smaller than the diameter of a channel without intersecting channels.

[0116] Figures 10-21 show embodiments of the foam elements, including exemplified dimensions of the lengths, diameters (0) and curvature (R), and the position and dimensions of the channel openings. P7326PC00

[0117] 18

[0118] Elongated connectors

[0119] The elongated connectors comprise a radially extending flange 3 configured as a stopper for the insertion of the connector into the channel opening. The flange may further provide stability between neighbouring connected foam elements. The efficiency of the stopper, i.e. the risk of the flange being pushed from the channel opening and into the channel, as well as the stability of the connection will depend on the relative dimensions of the flange, and foam element opening. It may be found advantageous that the connector flange has a radially extending portion, which is at least 2 or 3 mm larger than the cross-sectional size of the channel opening of the foam element. For example the channel opening of a foam element may be cylindrical with a diameter of between 32-33 mm, and the flange may be shaped as a disk having a diameter of 34- 36 mm.

[0120] In an embodiment of the disclosure, the connector flange has a radially extending portion, which is at least 2, 3, 4, or 5 mm larger than the cross sectional size of the channel opening, preferably more than 3 mm.

[0121] The frictional force between the inserted connector and the channel wall of the foam element also depends on the size and shape of the elongated connectors. For example, the elongated connector may have a shape that increases the surface contact area to the channel wall, thereby increasing the frictional force. Alternatively or in addition, the elongated connector may have a shape that increases the frictional force by radial compression and / or latch, e.g. obtained by the presence of transversely oriented ribs.

[0122] It is found that more robust connections and more durable connections on repeated assembly and disassembly, may be facilitated by elongated connectors comprising one or more transversely oriented ribs. A transversely oriented rib is extending radially outwardly from the elongated connector. Accordingly, a connector comprising two transversely oriented ribs may have a shape corresponding to a spool, and a connector comprising three transversely oriented ribs may have a shape corresponding to a double spool. The cross sectional shape of a transversely oriented rib, as seen in longitudinal cross section, is advantageously a gradual smooth wave shape similar to a sine wave, or a stepped sine wave for flexible manufacturing. The height of the ribs or P7326PC00

[0123] 19 waves is advantageously practically invisible to the naked eye, but will be tangible with the hands and on insertion and assembly, as illustrated in Figures 6-9.

[0124] Figures 6-7 show embodiments of a first end 2a of an elongated connector, where the flange and second end is omitted for clarity. The elongated connector comprises three transversely oriented ribs 7, as most clearly seen in the longitudinal cross sectional view in Figure 7A, where the ribs have a smooth wave shape with low height of e.g. 0.5 mm.

[0125] Figures 8-9 also show embodiments of a first end 2a of an elongated connector, where the flange and second end is omitted for clarity. The elongated connector comprises two transversely oriented ribs 7, as most clearly seen in the longitudinal cross sectional view in Figure 8B, where the ribs have a smooth wave shape with height of 0.5 mm.

[0126] In an embodiment of the disclosure, the first and / or second end of the connector comprises two or three transversely oriented ribs. In a further embodiment, the transversely oriented ribs have a height between 0.1-5 mm, more preferably between 0.2-2 mm, and most preferably between 0.3-1 mm, such as 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9 mm.

[0127] Figure 6A shows a connector end 2a comprising three transversely oriented ribs 7 in perspective view. Figure 6B shows the end flange of the connector, which may include a logo made visible and / or tangible by a different roughness or polishing degree, e.g. a roughness of CH 0. Figure 6C shows a longitudinal cross sectional view of the connector, and Figure 6D shows a transverse or a radial cross sectional view of the connector, including exemplified dimensions indicated by arrows. Figure 7 shows further embodiments of the connector in Figure 6 in longitudinal cross sectional view, including exemplified dimensions, e.g. diameters (0). The outer surface of the first connector end 2a may have a roughness adapted for handling and tactile feedback, e.g. a roughness of CH 28. The first connector end may further comprise a radial groove 8 such that the connector may be configured as a rotational shaft, where the radial groove has a lower roughness of e.g. CH 0.

[0128] It follows that when the connector end is inserted into the channel opening to the stopper position, the three transversely oriented ribs 7 of the connector will frictionally P7326PC00

[0129] 20 engage with the axially oriented ribs 6.1 of the channel wall, as shown in e.g. Figure 5. Specifically, the two transversely oriented ribs at the ends of the connector end may be frictionally engaged by radial compression, whereas the middle rib may be latched in the intersecting channel 5b, as shown in Figure 5.

[0130] In an embodiment of the disclosure, the first and / or second end of the connector comprises three transversely oriented ribs, and optionally has a smooth or stepped double spool shape. In a further embodiment, the transversely oriented ribs are configured such that when the connector end is inserted into a channel opening of a foam element comprising at least two intersecting channels, the middle rib is latched in an intersecting channel.

[0131] Figure 8 shows a connector end 2a comprising two transversely oriented ribs 7, where the dimensions are further configured for a rotational shaft by the radial groove 8 being disposed around the middle of the connector end. Figure 8A shows the connector in perspective view, and Figure 8B shows a longitudinal and a radial cross sectional view. Figure 9 shows further embodiments of the connector in Figure 8 in longitudinal cross sectional view, including exemplified dimensions. The outer surface of the first connector end 2a may have a roughness adapted for handling and tactile feedback, e.g. a roughness of CH 28. The radial groove 8 implies that the connector may be configured as a rotational shaft, where the radial groove has a lower roughness of e.g. CH 0.

[0132] In an embodiment of the disclosure, the first and / or second end of the connector comprises two transversely oriented ribs, and optionally has a smooth or stepped spool shape. In a further embodiment, the first and / or second end of the connector is configured for insertion into a channel opening of a disk shaped foam element.

[0133] The elongated connector advantageously has a cylindrical shape or ovalic or oval shape, or a columnar or prism shape approximating a cylindrical shape, such as an elongated element having a cross-section shape selected from the group of: circular, oval, and polygonal, such as hexagonal, octagonal, decagonal, dodecagonal. The frictional force between the inserted connector and the foam element is further determined by the size of the connector. For easy insertion as well as stable, robust P7326PC00

[0134] 21 and durably assembled structures, the connector advantageously has a cross-sectional size or diameter of below 7 cm, such as 32.2 mm, as shown in Figures 7A and 9A.

[0135] In an embodiment of the disclosure, the elongated connector has a cross-section shape selected from the group of: circular, ovalic or oval shaped, and polygonal, such as hexagonal, octagonal, decagonal, dodecagonal. In a further embodiment, the elongated connector is cylindrical with a first cylindrical end, a second cylindrical end, and a radially extending flange placed between the two cylindrical ends. In a further embodiment, the connector end diameter is between 20-70 mm, more preferably between 40-60 mm, and most preferably between 30-50 mm, such as 32.2 mm ± 0.1 mm.

[0136] Upon compressive contact between the surface of the foam element, and the radial flange 3 of the connector, the foam is configured to be compressed and the connector flange partially depressed into the compressed planar surface of the foam element, if the hardness of the flange is higher than the hardness of the foam. However, the degree of deformation and countersinking of the connector flange into the foam element surface, may also depend on the shape and size of the connector, as well as the presence and dimensions of a recess 5c within the surface of the foam element. To ensure uniform and reliable countersinking, and / or facilitate dimensioning of the recess, the radial flange is advantageously planar with a regular shape, such as a planar circular, oval, or polygonal shape, such as hexagonal, octagonal, decagonal, dodecagonal. Further, to ensure sufficient countersinking, facilitating abutting neighbouring foam building elements with essentially no gap between them, and / or recess dimensioning, the thickness of the flange should be small, but still thick enough to provide mechanical strength and robustness to the flange, such that it is adapted as a stopper.

[0137] In an embodiment of the disclosure, the radially extending flange is planar. In a further embodiment, the radially extending flange has a shape selected from the group of: circular, oval, and polygonal, such as hexagonal, octagonal, decagonal, dodecagonal. In a further embodiment, the thickness of the radially extending flange is below 4 mm, more preferably below 3 or 2 mm, and most preferably equal to or below 1.5 mm. P7326PC00

[0138] 22

[0139] The frictional force between the inserted connector and the foam element channel and channel opening may depend on the length of the connector end, since this influences the contact surface area between connector and the channel wall. The longer the connector end, the stronger the frictional force may be. However, the versatility and the possible connection options between multiple connectors and multiple foam elements increases, the shorter the length of the connection ends, since the risk of connectors blocking a neighbouring foam element channel opening, or an intersecting channel, is reduced. Thus, to improve the assembling versatility and provide sufficient frictional forces, the kit advantageously comprises one or more connectors, where both ends are longer, where both ends are shorter, and / or where the first end is longer and the second end is shorter. Examples of connectors are: a connector where both ends are 98 mm long, as shown in Figures 6-7, and a connector where both ends are 33.05 mm long, as shown in Figures 8-9, and combinations thereof.

[0140] In an embodiment of the disclosure, the first end and the second end of the connector are symmetrical or asymmetrical. In a further embodiment, the first end of the connector has a length between 2-150 mm, more preferably between 5-120 mm, and most preferably between 10-100 mm, such as 98 mm or 33.05 mm. In a further embodiment, the second end of the connector has a length between 2-150 mm, more preferably between 5-120 mm, and most preferably between 10-100 mm, such as 98 mm or 33.05 mm.

[0141] The frictional force between the connector and channel wall and channel opening of the foam element may also depend on the connector material.

[0142] In an embodiment of the disclosure, the connector material is selected from the group of: wood, and polymers, such as thermoplastic polymers, such as acrylonitrile butadiene styrene (ABS).

[0143] To improve simple and easy handling of the connectors during assembly / disassembly, the connectors are advantageously light-weight, which may be obtained by the connectors being hollow. A hollow polymer is simply and cost-efficiently manufactured by e.g. injection molding. A hollow connector further has the advantage that it provides space, or a compartment, for storing auxiliary parts, such as electronic elements. P7326PC00

[0144] 23

[0145] Optionally, the hollow connector is assembled from multiple parts, thereby facilitating a storage compartment in the interior of the connector.

[0146] In an embodiment of the disclosure, the connector is a hollow element. In a further embodiment, the connector is made by an injection molding process.

[0147] Rotational shafts

[0148] As described above, the kit may advantageously comprise one or more disc or wheel shaped foam elements configured to be rotatably assembled to a connector, such that the connector may function as a rotation shaft. Accordingly, the disc shaped foam element may comprise a concentric opening adapted for receiving a rotational shaft, as shown in Figure 3E, such that it may function as a rotatable wheel. By rotatable wheel is meant a wheel that is rotatable around a rotation axis, more specifically a central and concentrically positioned rotation axis, i.e. the rotation shaft. Thus, the elongated connector according to the present disclosure may be adapted as a rotation shaft.

[0149] The ability, or resistance, of the wheel to rotate will depend on the frictional rotation resistance between the central wheel opening and the rotation shaft. Inherently, the frictional rotation resistance will depend on the fastening mechanism between the wheel and the rotation shaft. If the frictional rotation resistance is high, the wheel will have a high resistance to rotate, corresponding to a high rolling resistance. If the frictional rotation resistance is low, the wheel will have a low rolling resistance. The frictional rotation resistance between the concentric opening of a disc shaped foam element and an elongated connector attached as a rotation shaft, may be high. The high frictional rotation resistance may be due to a high surface contact area between the connector and the channel wall, and / or due to the surface structure, morphology, or roughness of the foam element channel wall and the connector surface.

[0150] For example, the surface of the connector ends may have a roughness or a granulated surface due to the fabrication method and / or post-polishing of the connector. The surface roughness may facilitate handling and insertion into the of the foam element channel openings, and provide desirable tactile sensations. It is seen that a textured surface with a surface roughness (Ra) of between 1.01-405 pm, corresponding to CH20-CH32 is advantageous. By the term “surface roughness” is meant the relative smoothness of the surface profile, and the roughness may be defined by “Ra” referring P7326PC00

[0151] 24 to the calculated average between peaks and valleys on a surface. The roughness may correspondingly be defined by the polishing level, e.g. using Charmilles EDM finish specification (CH).

[0152] In an embodiment of the disclosure, the connector comprises a textured surface having a surface roughness, wherein the roughness preferably has a Ra of between 1.01-4.05 pm (CH20-CH32), more preferably between 1.60-3.60 (CH24-CH31), and most preferably between 2.03-2.84 pm (CH26-CH29), such as a Ra of 2.54 pm (CH28).

[0153] The elongated connector may be applied as a rotation shaft for a wheel shaped foam element. For example, a the first connector end 2a may be inserted into a cuboid foam element to the stopper position defined by the radial flange 3, and the second connector end 2b may be engaged to a wheel shaped foam element, as shown in Figure 3E, such that the wheel is rotatable around the second connector end as rotation shaft.

[0154] A predefined and / or controllable rotation resistance may be advantageous for functional toys for children, where rapid rolling may be dangerous. To control the rolling resistance and the assembly of the wheel to the connector end, the connector may comprise a radial groove 8 as fastening mechanism and defining the point of engagement with the concentric opening of the wheel, as indicated in e.g. Figures 6A, 7A, 8A, 9B. To further provide sufficient rolling resistance, the radial groove may have a lower roughness than the general connector end, such as a roughness of CH 0.

[0155] In an embodiment of the disclosure, the connector comprises one or more radial grooves in the connector circumference. In a further embodiment, the radial groove comprises a smooth surface having a surface roughness with Ra of between 0.08-0.16 pm (CH-2 to CH4), more preferably between 0.09-0.12 pm (CH-1 to CH2), such as 0.10 pm (CH0).

[0156] Elongated connector where at least one of the connector ends is shorter may be used for assembling the wheel shaped foam elements to reduce the length of the exposed connector end for safety reasons. For example, connectors where both ends are shorter, e.g. 33.05 mm long, as shown in Figures 8-9 may be used. Thus, the radial P7326PC00

[0157] 25 groove 8 may be disposed and dimensioned such that exposed connector ends are avoided on assembly.

[0158] In an embodiment of the disclosure, the width of the groove is between 5-15 mm, more preferably between 7-13 mm, and most preferably between 9-12 mm, such as 11 mm. In a further embodiment, the radial groove is located a predefined distance from the flange, preferably between 5-20 mm from the flange, more preferably between 10-15 mm, such as 13.5 mm ± 0.5 mm from the flange.

[0159] Optionally, the radial groove 8 may comprise a further groove 8.1 that extends partially along the circumference of the radial groove, as e.g. shown in Figures 4A, 6C, 8B. The further groove may facilitate the manufacture of the connector and groove, and the further groove may have a width of between 1-4 mm,, such as 2 mm ± 0.1 mm.

[0160] To improve the versatility of the kit and to provide functional toys for children with variable motor skills and of variable ages, rotatable wheels with variable rolling resistances are advantageous. Thus, the fastening mechanism between the wheel and rotational shaft is advantageously configured to have adjustable frictional resistance.

[0161] This may be obtained a fastening mechanism, such as a snap-fit, between the rotation shaft or connector end and a bushing placed in the concentric opening of the wheel, as described in e.g. Figures 5-8 of WO 2019 / 193157 herein incorporated by reference. The connector is here attached to the bushing by a snap-fit fastening mechanism. For example, the snap-fit fastening may be obtained between a protrusion of the bushing and a radial groove in the rotation shaft or connector end circumference. Thus, the contact area between the rotation shaft and the bushing is essentially the contact between the protrusion and groove. Thus, the frictional rotation resistance of the wheel is dependent on the contact area between the protrusion and groove.

[0162] Thus, wheels with adjustable rolling resistance can be assembled from the kit of the present disclosure. This is especially advantageous for functional toys for children of different ages and motor skills. For example, a baby walker or children’s walker, may be adjusted to the walking speed of the child. In particular a toddler that is learning to walk can use the presently disclosed kit of parts as a baby walker where one or more of the wheels attached by means of the high friction assembly such the child does not P7326PC00

[0163] 26 fall when trying to walk supporting itself to the baby walker. When the child is older the presently disclosed kit of parts is probably more fun to play with if all the wheels rotate with a low friction.

[0164] Reference numbers

[0165] 1 - kit of parts

[0166] 2 - elongated connector, e.g. cylindrical connector

[0167] 2a - first connector end

[0168] 2b - second connector end

[0169] 3 - radial flange

[0170] 4 - foam element

[0171] 4a - first surface of foam element

[0172] 4b - second opposite surface of foam element

[0173] 5 - channel opening, e.g. cylindrical opening

[0174] 5a - channel without intersecting channels

[0175] 5b - channel with intersecting channels

[0176] 5c - contact surface between adjacent surfaces

[0177] 5d - recess

[0178] 6 - channel wall

[0179] 6.1 - axially oriented ribs

[0180] 7 - transversely oriented ribs

[0181] 8 - radial groove

[0182] 8.1 - further groove

Claims

P7326PC0027Claims1. A kit of parts for a functional toy, comprising: one or more foam elements comprising at least one planar surface, the surface comprising at least one channel opening configured for receiving a first end of a connector, the channel extending perpendicular to the planar surface, wherein the channel is defined by a channel wall comprising one or more axially oriented ribs, one or more elongated connectors having a first end, a second end, a radially extending flange between the two ends, the flange configured as a stopper for the insertion of the first end into the channel opening, wherein the connector comprises one or more transversely oriented ribs, and wherein the kit of parts is configured such that when the first end of the connector is inserted into the channel opening to the stopper position, the at least one transversely oriented rib of the connector is frictionally engaged with the at least one axially oriented rib of the channel wall.

2. The kit according to claim 1 , wherein the surface of the foam element comprises a recess around the channel opening configured for receiving a first side of the flange.

3. The kit according to claim 2, wherein the recess has a shape selected from the group of: disk, cone, truncated cone, cubic, half cylindrical, spheric, and any combination thereof.

4. The kit according to any one of claims 2-3, wherein the recess is configured such that when the first connector end is received within a first channel opening of a first foam element, and the second connector end is received within a first channel opening of a second foam element, the contact surface of the first and second foam elements is abutting.

5. The kit according to any of the preceding claims, wherein the at least one surface is essentially planar and configured such that when the first connector end is received within a first channel opening of a first foam element, and the second connector end is received within a first channel opening of a secondP7326PC0028 foam element, the contact surface of the first and second foam elements is abutting.

6. The kit according to any one of claims 2-5, wherein the contact surface of the first and second foam element is essentially abutting with a gap below 1 mm, more preferably below 0.5 mm, such as 0 mm.

7. The kit according to any one of the preceding claims, wherein the channel wall comprises between 2-20 axially oriented ribs, more preferably between 4-18, and most preferably between 6-16, such as 8, 10, 12, or 14 axially oriented ribs.

8. The kit according to any one of the preceding claims, wherein the axially oriented ribs are spaced apart at a predefined distance.

9. The kit according to any one of the preceding claims, wherein the axially oriented ribs are spaced apart in a rotational symmetric pattern.

10. The kit according to any one of the preceding claims, wherein the height of the axially oriented ribs is between 1-4 mm ± 0.5 mm, more preferably between 1.5- 3 mm ± 0.5 mm, such as 2 mm ± 0.5 mm.11 . The kit according to any one of the preceding claims, wherein the height of the axially oriented ribs varies along the axial direction.

12. The kit according to claim 11 , wherein the height of the axially oriented ribs is lower at the channel opening.

13. The kit according to any one of the preceding claims, wherein the cross sectional shape of the axially oriented ribs are selected from the group of: squared, rectangular, triangular, circular, semicircular.

14. The kit according to any one of the preceding claims, wherein the cross- sectional shape of the at least one channel opening is identical to the cross- sectional shape of a connector end.

15. The kit according to any one of the preceding claims, wherein the shape of the channel is essentially cylindrical and the connector end is essentially cylindrical.P7326PC002916. The kit according to any one of the preceding claims, wherein the channel opening has a cross-sectional size dimension, which is smaller or larger than the cross-sectional size of the connector end.

17. The kit according to claim 16, wherein the channel opening has a cross- sectional size dimension, which is at least 0.2, 0.3, 0.4, or 0.5 mm smaller or larger than the cross-sectional size of the connector.

18. The kit according to any one of the preceding claims, wherein the shape of the channel is cylindrical.

19. The kit according to claim 18, wherein the channel diameter is constant along the channel length.

20. The kit according to any one of the preceding claims, wherein the diameter of the channel is between 20-45 mm, more preferably between 25-40 mm, and most preferably between 30-35 mm, such as 32.7 mm ± 0.5 mm or 32.5 mm ± 0.5 mm.

21. The kit according to any one of the preceding claims, wherein the foam element comprises at least two surfaces, each surface comprising at least one channel opening defining a channel, wherein the channel opening is configured for receiving a first end of a connector.

22. The kit according to claim 21 , wherein the channels are configured for intersecting each other, optionally configured for perpendicular intersection.

23. The kit according to any one of claims 21-22, wherein the diameter of a channel with intersecting channels is smaller than the diameter of a channel without intersecting channels.

24. The kit according to claim 23, wherein the diameter of a channel with intersecting channels is at least 0.2, 0.3, 0.4, or 0.5 mm smaller than the diameter of a channel without intersecting channels.P7326PC003025. The kit according to any one of the preceding items, wherein the foam element shape is selected from the group of: cube, cuboid, square prism, prism, cylinder, half cylinder, cone, pyramid, disc, and any combinations thereof.

26. The kit according to claim 25, wherein the foam element shape is a disc configured as a wheel.

27. The kit according to any one of the preceding claims, wherein the at least one surface of the foam element comprises 2 or more channel openings, such as 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 channel openings.

28. The kit according to any one of the preceding claims, wherein the at least one channel opening extends from a first surface of the foam element to the opposite second surface of the foam element, optionally wherein the first and second surfaces are essentially planar surfaces.

29. The kit according to any one of the preceding claims, wherein the foam element material is selected from the group of: EVA copolymers and / or EPP monopolymers.

30. The kit according to any one of the preceding claims, wherein the foam element material has a hardness rating above about OO 20, more preferably above about O 20, and most preferably above about 10, 20, 30, 40, 45 or 50 on the Shore C scale.

31. The kit according to any one of the preceding claims, wherein the shape of the foam elements is obtained by casting, molding, and / or a mechanical cutting process, such as stamping, punching, and / or blade cutting, and preferably is obtained by molding.

32. The kit according to any one of the preceding claims, wherein the connector flange has a radially extending portion, which is at least 2, 3, 4, or 5 mm larger than the cross sectional size of the channel opening, preferably more than 3 mm.P7326PC003133. The kit according to any one of the preceding claims, wherein the first and / or second end of the connector comprises two or three transversely oriented ribs.

34. The kit according to any one of the preceding claims, wherein the transversely oriented ribs have a height between 0.1-5 mm, more preferably between 0.2-2 mm, and most preferably between 0.3-1 mm, such as 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9 mm.

35. The kit according to any one of claims 33-34, wherein the first and / or second end of the connector comprises two transversely oriented ribs, and optionally has a smooth or stepped spool shape.

36. The kit according to claim 35, wherein the first and / or second end of the connector is configured for insertion into a channel opening of a disk shaped foam element.

37. The kit according to any one of claims 33-36, wherein the first and / or second end of the connector comprises three transversely oriented ribs, and optionally has a smooth or stepped double spool shape.

38. The kit according to claim 37, wherein the transversely oriented ribs are configured such that when the connector end is inserted into a channel opening of a foam element comprising intersecting channels, the middle rib is latched in an intersecting channel.

39. The kit according to any one of the preceding claims, wherein the elongated connector has a cross-section shape selected from the group of: circular, oval, and polygonal, such as hexagonal, octagonal, decagonal, dodecagonal.

40. The kit according to any one of the preceding claims, wherein the elongated connector is cylindrical with a first cylindrical end, a second cylindrical end, and a radially extending flange placed between the two cylindrical ends.

41. The kit according to claim 40, wherein the connector end diameter is between 20-70 mm, more preferably between 40-60 mm, and most preferably between 30-50 mm, such as 32.2 mm ± 0.1 mm.P7326PC003242. The kit according to any one of the preceding claims, wherein the radially extending flange is planar.

43. The kit according to claim 42, wherein the thickness of the radially extending flange is below 4 mm, more preferably below 3 or 2 mm, and most preferably equal to or below 1.5 mm.

44. The kit according to any one of the preceding claims, wherein the radially extending flange has a shape selected from the group of: circular, oval, and polygonal, such as hexagonal, octagonal, decagonal, dodecagonal.

45. The kit according to any one of the preceding claims, wherein the first end and the second end of the connector are symmetrical or asymmetrical.

46. The kit according to any one of the preceding claims, wherein the first end of the connector has a length between 2-150 mm, more preferably between 5-120 mm, and most preferably between 10-100 mm, such as 98 mm or 33.05 mm.

47. The kit according to any one of the preceding claims, wherein the second end of the connector has a length between 2-150 mm, more preferably between 5- 120 mm, and most preferably between 10-100 mm, such as 98 mm or 33.05 mm.

48. The kit according to any one of the preceding claims, wherein the connector comprises a textured surface having a surface roughness, wherein the roughness preferably has a Ra of between 1.01-4.05 pm (CH20-CH32), more preferably between 1.60-3.60 (CH24-CH31), and most preferably between 2.03-2.84 pm (CH26-CH29), such as a Ra of 2.54 pm (CH28).

49. The kit according to any one of the preceding claims, wherein the connector comprises one or more radial grooves in the connector circumference.

50. The kit according to claim 49, wherein the radial groove comprises a smooth surface having a surface roughness with Ra of between 0.08-0.16 pm (CH-2 to CH4), more preferably between 0.09-0.12 pm (CH-1 to CH2), such as 0.10 pm (CH0).P7326PC003351. The kit according to any one of claims 49-50, wherein the width of the groove is between 5-15 mm, more preferably between 7-13 mm, and most preferably between 9-12 mm, such as 11 mm.

52. The kit according to any one of claims 49-51, wherein the radial groove is located a predefined distance from the flange, preferably between 5-20 mm from the flange, more preferably between 10-15 mm, such as 13.5 mm ± 0.5 mm from the flange.

53. The kit according to any one of the preceding claims, wherein the connector material is selected from the group of: wood, and polymers, such as thermoplastic polymers, such as acrylonitrile butadiene styrene (ABS).

54. The kit according to any one of the preceding claims, wherein the connector is hollow.

55. The kit according to any one of the preceding claims, wherein the connector is made by an injection molding process.

56. A functional toy comprising the kit of parts according to any one of the preceding claims.

57. A functional toy configured to be detachably assembled from the kit of parts according to any one of the preceding claims.

58. The functional toy according to any one of claims 56-57, wherein the functional toy is selected from the group of: children’s walker, push along wagon, children push and ride-ons, wheel toys, rocking horse, and aid for crawling, standing, rolling, jumping, climbing, and balance training unit.

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