1Zinc Alloy, ABS Material: These cars are made of premium zinc alloy and ABS material, with smoothly edges, no burrs, no injury to hands, and is resistant to falling and collision. 2Fine Workmanship: These cars are well made with high simulation, accurate mold, the advanced spray paint original car is reduced and refined, with realistic shape. 3No Battery Required: This car is novel and fun to run with your own rebound. You can play anytime and anywhere without charging the battery. 4Long Life Span: These cars are strong, smoothly, wear resistant and more resistant to falling, comes with a long life span. 5Easy Storing: One car for one slot, these cars are more convenient to store, easy to organize, not easy to lose, cultivate children's good habits of storage.