Police Car Toy Stunt Car B/O 360 Spinning Sound LED Light Up Disco Bump-N-Go Car. ELECTRONIC TOY BUMP-N-GO - TOY POLICE CAR You don't need to hand wave,just put in 3 AA batteries(not included) and press the bottom on/off switch to "on" position,then after driving for a certain distance,car will Deformatiom automatically! Amazing open door super dream police patrolling car with 3D projection light, music, bump & go action mode and 360 degree rotation Functions of this car can engage your child playing and having fun in leisure. Best Birthday Gift for Kids