Specialized's Boy's Hotrock 20 Coaster is an easy way for little kids to step up to big-time fun. It features an aluminum frame built to withstand the rigors of childhood bike riding and a rear hand brake to get him ready for bigger bikes down the road, while the coaster brake provides a familiar backup to facilitate the learning process. Plus, the Hotrock comes with fat, knobby tires for serious traction on all types of terrain, too.