STURDY FRAME - Made of premium steel to survive the bumps of learning; Plus, the durable steel frame is backed by our limited lifetime warranty. COASTER BRAKE - This kids bike come with coaster brake, simply pushing the pedal backwards and stop the bike. SUITABLE FOR 2-4 YEARS - 12' is for 2-4 years(33'-41') girls & boys, comes with basket to transport their loved doll and training wheels for safe cycling. SHOCK PROOF SEAT - Shock-proof bike seat is bigger than normal seat, more comfortable for kids cycling. EASY TO ASSEMBLE - The kids bike is 85% assembled, come with basic assembly tools (PUMP NEEDED FOR THE TIRE).