EASY to PLAY No batteries needed ,just a simple pull-back action to get these cars racing fast and furious, but if you push the back cover under the car forward, it will flip over and bounce off when the cars collide. ENDLESS FUNKids will jump up and down with joy and giggles when they see their race car hit a wall or another stunt car.The racing colors are bright and colorful, and they can withstand rough use and bumps on the wall. DURABLE MATERIALDurable shell continues to pass hundreds of collision tests, and two cars through friction, will not leave scratches, smooth and rounded edges to protect children's safety. GREAT VALUE-PACK 8 RACINGA different kind of birthday present, 8 crash cars, endless collisions, the ideal birthday present for kids, Christmas, Easter gift. SUYPAS Promises To Provide Friendly After-Sales Service With A One-Year Warranty To Ensure You Use Our Products Without Any Worries, Please Email Us If You Have Any Product Questions And Our Customer Service Team Will Reply To You Within 24 Hours.