Skitter^TM is a children's mobile toy that utilizes centrifugal force acting on gravity for self-propulsion. It operates with simple maneuvers, without batteries or a motor. It converts these forces and motions into forward (and backward) motions. The faster your body moves, the faster Skitter's^TM will travel. Skitter's design is simple yet unique and environmentally friendly. It is more than a toy for children, it is exercise equipment! The Skitter's body is made of high quality PP (polypropylene) and ABS plastic making it safe, durable and light. The steering post is made of steel to provide long wear. All running wheels have double ball bearings to provide a smooth ride and durability. Its features meet U.S. and European safety standards.