Abstract: A logical toy containing movable and/or rotatable elements or element groups, the path of motion or axis of rotation thereof, including sensors staying in an actuating forced connection directly or through a mechanic transmission. One or two circuit switches are suitable for closing and opening the path of electric, magnetic or optical signals, which form, individually or in groups, one or more logical nets serving as signal transmitters. The outputs thereof are connected directly through mechanic connecting elements (4, 5, 9, 11) to an electric counter (2). The sensors, i.e. the signal transmitters (1) containing the sensors, can be connected to an electronic chronometer (6). One or more axes of the toy are hollow or tubular, and the sensors and/or their leads are arranged in the inside of the tubular axes (22) and/or in the hollow of the center-plate elements (18).