Abstract: A toy car and roadbed unit which comprises a roadbed on which there is provided at least one electric track including three conductive paths which are connected to a positive output terminal, a negative output terminal and a center tap of the DC power source respectively and not less than two toy cars which run along two electric tracks each comprising three conductive paths in which the conductive path connected to the center tap is commonly used.

Abstract: A toy car racer in combination with a roadbed on which said toy car racer travels in random contacts with upright side guide walls provided along opposite marginal ends of the roadbed in which either of the front or the rear wheels of the toy car is associated with a self-steering mechanism including symmetrically arranged retractable arms whereas the other two wheels are associated with a propelling means and the upright side guide walls are provided with a plurality of barrier means adapted to engage with the projected arms of the self-steering mechanism thereby to change the advancing direction of the toy car racer.