Abstract: A detachably coupling device for a detachably coupling two bodies. The detachable coupling device on each of the bodies comprises a magnet movably mounted on the body and having a north pole and a south pole. The strength of the magnetic field existing between the magnets on the first body the second body may be selected to allow, preferably, manual detachable coupling of the two bodies. As the two bodies are placed closer together until the magnets are contiguous, the movement of the magnets will cause the magnets under the influence of the magnetic field to move until the north pole of one magnet is contiguous the south pole of the other magnet thereby coupling the two bodies together.

Abstract: A toy vehicle adapted to run on a track wherein the track defines a preselected pathway with a preselected geometrical configuration. A plurality of motion command modules are mounted at predetermined locations on the track and each motion command module has a detectable motion pattern array and the motion pattern array of each command module may be different than the other motion command modules. The toy vehicle has a motion producing device such as an electric motor for providing movement characteristics of the toy vehicle on the track in response to receipt of a motion control signal. A pattern detection unit is mounted on the vehicle and detects, for example, by optical detection, the detectable movement pattern array of each motion command module and generates the motion control signal in response thereto.