There is a cover at the bottom of the helicopter to protect the universal wheel from being damaged. The helicopter will move only once you remove the bottom cover Unique Bump and go action Helicopter, motor driven Made of durable heavy-duty good quality plastic Colorful 3-D lights, swirls and music, 360 revolve Ultimate addition to your toy collectibles, Build in melody Great gift idea; visual perception exercises to help colour recognition; Helps younger children develop hand-eye coordination Battery: 3 AA batteries Required (Not Included)