The wheels were constricted by a ratchet mechanism to rotating forward. As the rider bounced up and down on the saddle, the toy moved forward in a way somewhat resembling a Geometer caterpillar, with the ratcheting wheels making a clicking sound.
The wheels of the toy were constrained by a ratchet system to turn forward. While the rider oscillated up and down on the saddle, the toy advanced in a way that resembled a Geometer caterpillar, with the ratcheting wheels making a clicking noise.