Tracks Cars Only Replacement, Flex Track Race Cars for Magic Tracks Glow in the Dark, LED Lights Up Battery Operated Snap N Glow Trax Cars Accessories, Compatible with Most Car Tracks for Kids (3packSafe and Easy to Play These track cars are made by environmentally friendly non toxic plastic materials, which are safe for children. For these tracks cars, the switch are at the bottom. The child can easily use it independently and have fun! Each Toy Car requires 2 AA battery (NOT included). We suggest you to purchase the rechargeable battery to save battery cost. If you wanna know more details about this track car please watch the video at the end