Best Gift for Kids -Four different colour of light up track cars can attract kids attention and make them feel happy. Parents can interact with kids by choosing one of the cars, and act as a driver of three different functions. It can not only be enhanced family relationships, but also educated children about traffic safety by these track cars. If you wanna know more details about this track car, please watch the video at the end of the picture! Safe and Easy to Play - These track extra cars are made by environmentally friendly non-toxic plastic materials, which are safe for children. For these racing 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. Cool LED Light up Track cars - These four cool race track cars feature 5 LED lights that kids will be attracted and enjoy it. But for this light up design, plastic has to be thin enough. So these cars had better not hit hard objects or hit walls hard, and do not fall from high places to protect them for long-term usage. Fit most Tracks - These track cars compatible with most race track sets, including dinosaur toys track,rainbow tracks and so on(the inner width of the track should be at least 2.17 inches). It can also be played on any smooth surface independently to stimulate children's imagination.