Best Gift for Kids - Four different color light-up track cars can attract kids' attention and make them happy. Parents can interact with kids by choosing one of the cars and playing together with three different functions. This helps enhance family relationships and teaches children about traffic safety through play. For more details about this track car, please watch the video at the end of the product images. Safe and Easy to Play - These additional track cars are made from environmentally friendly, non-toxic plastic materials, safe for children. The switch is located on the bottom, allowing children to easily operate the toy independently. Each toy car requires 2 AA batteries (not included). Rechargeable batteries are recommended to save on battery costs. Cool LED Light-Up Track Cars - These four race track cars each feature 5 LED lights that attract kids and enhance playtime enjoyment. Due to the light-up design, the plastic must be thin. To ensure durability, avoid strong impacts with hard objects or walls, and prevent drops from high places. Fit Most Tracks - These track cars are compatible with most race track sets, including dinosaur-themed tracks, rainbow tracks, and others (inner track width should be at least 2.17 inches). They can also be played on any smooth surface separately, encouraging imaginative play.