Best Gifts for Children- Four different colors of light rail cars can attract children's attention and make them feel happy. Parents can interact with their children by choosing one of the vehicles and act as drivers for three different functions. These rail cars not only enhance family relationships, but also educate children about traffic safety. If you want to learn more about this track car, watch the video at the end of the picture Safe and Easy to Play- These track attachments are made of eco-friendly non-toxic plastic material, which is not harmful to children. For these race cars, the switch is on the bottom. Kids can easily use it independently and have fun Each toy car requires 2 AA batteries (not included). We recommend that you purchase rechargeable batteries to save battery costs. Cool LED Illuminated Rail Cars- These four cool rail cars are equipped with 5 LED lights, kids will be attracted and enjoy it. But for this light-emitting design, the plastic has to be thin enough. So these cars are best not to hit hard objects or hit a wall with force, and do not fall from a height to protect them for long-term use. Fits Most Tracks- These track cars are compatible with most track kits, including dinosaur toy tracks, rainbow tracks, and more (tracks should be at least 2.17 inches wide inside). It can also be played independently on any smooth surface to spark a child's imagination.