Abstract: An electrical connection device for a toy vehicle track constructed of a track base to which conductor rails are mounted. The connection device comprises a contact base, two or more contacts resilently mounted in or on the base, each contact being arranged and extending through a hole in the track base to engage electrically with the conductor rail of the track, and bias elements holding each contact in engagement with the track.

Abstract: An audio frequency signal generating circuit for producing repeated tones that includes a pair of transistors. The first transistor has its collector connected to a voltage supply line, has a capacitor connected between its emitter lead and earth, and also has an inductance connected to its emitter lead. The collector of the second transistor is connected to the other side of the inductance and the emitter is connected to the other side of the supply. The first transistor has biasing means to bias it into an operating condition and the second transistor is arranged with reactive feedback to cause oscillation.

Abstract: A submersible toy or model comprising a body having a motor arranged to propel it in a forward direction, a watertight buoyancy compartment, and at least one elevator flap which is preset, or capable of being preset, at a downward inclination to the forward direction of movement of the toy, the surface area of the elevator or elevators, the size of the buoyancy compartment, and the power of the motor all being so related that when the model is placed in water with its elevator(s) in the downward position with the motor on, it continually dives and resurfaces.