Spline smoothing and nonparametric regression

A wheeled toy vehicle including a drive assembly which comprises a monofilament line having one extremity connected to a manually operable control means and the opposite end connected to the running gear of the vehicle. The dimensions and configuration of the monofilament line is such as to transmit rotation of the line about its own longitudinal axis, caused by activation of the control means, directly to the running gear which may comprise a drive axle and/or one or more drive wheels. Connecting means may attach the one extremity of the line to a predetermined outer portion of an axle or wheel by means of forming a socket therein correspondingly shaped to at least partially enclose a finger attached to the extremity of the line means cooperating therewith. Alternately, a finger can be connected to the extremity of the drive axle and be disposed so as to be enclosed within a socket formed within a sleeve which is connected to the extremity of the line and comprises another embodiment of the connecting means.