-Adjustable seat and handlebar for kids of different ages-Removable training wheels ensure a triangular frame for stability-Hand brake and coaster brake (pedal backwards to stop) realize full control-Fully enclosed chain guard protects kids from pinch injuries-Wheels are anti-slip leak-proof wear resistant and puncture-proof-Detachable doll seat allows kids to carry teddy bears for an adventure-Wheel reflectors front and rear reflectors to warn others to give way-Comfy TPR grips and cushione