1. Adjustable seat and handlebar for kids of different ages2. Removable training wheels ensure a triangular frame for stability3. Hand brake and coaster brake (pedal backwards to stop) realize full control4. Fully enclosed chain guard protects kids from pinch injuries5. Wheels are anti-slip, leak-proof, wear resistant and puncture-proof6. Detachable doll seat allows kids to carry teddy bears for an adventure7. Wheel reflectors, front and rear reflectors to warn others to give way8. Comfy Tpr grips and cushioned saddle for essential comfort during riding9. Has passed the Astm certification and Cpsia certification10. Applicable to the speed bump, cement floor, boardwalk, and more