A diving toy that is comprised of a housing with a motor, battery and magnetic
reed switch positioned inside the housing. A
propeller is attached to an axle of the motor protruding through the rear end of the housing. A
ballast is arranged inside the housing to provide positive
buoyancy and a front end down attitude. A plurality of fins protrude from the housing surrounding the
propeller for improving
directional stability. A lever having one end rotatably mounted to the outside of the housing and another end provided with a
magnet. When the toy is dropped or thrown front end first into a body of water, or when pushed in a downward motion from a submerged state,
hydrodynamic forces rotate and then hold the lever and accordingly the
magnet in a rearward position so long as there is downward motion, aligning the
magnet adjacent to the
reed switch, thereby actuating the
reed switch to close a circuit between the battery and motor activating the motor, and forces generated by the spin of the
propeller overcome the toys positive
buoyancy propelling the toy in a continuous dive until it collides with a bottom of the body of water or another object stopping the dive, whereby gravity rotates the lever and magnet forward away from the reed switch to shut off the motor, the positive buoyant toy then floats to a surface of the body of water where it can be launched into another dive.