Roller racer

A Roller Racer, or Flying Turtle as it was originally named by the inventor, is a toy human-powered vehicle for children. It was invented in the 1970s by a retired Boeing engineer as a gift for his grandson, using a tractor seat for the prototype toy. The vehicle consists of an injection-molded, polyethylene seat with rear wheels, attached to a T-style handlebar by a pin joint. The handlebars also have wheels, attached to what would be the vertical part of the "T". In the 1980s the Roller Racer was sold under the WHAM-O brand name Dragonfire, but has been manufactured by Mason Corporation of Brentwood, Tennessee, US, since January 1987.

The method of propulsion is unique to this scooter. The user moves forward by oscillating the handlebars from side to side. Published studies in Experimental Non-Linear Physics have been conducted worldwide on this product. It is used in amusement parks, schools, day care centers, family fun centers and homes.