Inchworm (toy)

The Inchworm was a ride-on toy for children produced by the Hasbro Corporation, first introduced in the early 1970s.[1] Inchworm was designed by Joseph M. Burck while he worked for Marvin Glass and Associates. Burck built the first inchworm using his clothes-dryer's hose and tested it with his then-three-year-old son.[2][3] A scooter with yellow wheels in the shape of a green caterpillar wearing a yellow hat, the Inchworm was jointed under the saddle so its wheelbase could expand and contract. 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.