Polygon kids bikes are bicycles specifically designed for children. Polygon kids bikes come with all parts scaled down to fit smaller bodies, not simply the frame. By changing the cranks, pedal, wheels, handlebars and gears Polygon kids bicycles are designed so that children can have an enjoyable time in learning to ride as well as continuing to ride their bike. Cycling allows an enormous sense of freedom for any child, so it is important to ensure your kid's bike is safe and comfortable.