"Material: Made of high-quality and durable plastic, high strength, not easy to break, good quality, non-toxic, no peculiar smell, smooth and burr-free, and long use time. Unique toy design: Beautiful and unique gear toy, internal mechanical gear structure, transparent shell for easy observation. Built-in color LED lights, turn on the control switch, the lights will change and flash with the rhythm of the music. Endless fun: Gears with numbers or letters, brightly colored, can attract childrens attention and bring them endless fun. At the same time, it can enhance and cultivate childrens hands-on ability, cognitive ability, sorting ability and learning interest. Universal wheel driving: Universal wheels are installed at the bottom of the vehicle, and the toy car will automatically change its driving direction when encountering obstacles during driving. Need to install 3 AA batteries to supply power (batteries are not included). The best gift: This is the best toy suitable for children over 3 years old. You can give this transparent gear toy as a beautiful gift to your children so that they can play with friends of the same age"