Bullet Points:   1、Round Edge Design: It is made of high-quality ABS material, with harmless water-based paint, polished smooth edges and corners, and it is safe to use. With a built-in mechanical linkage track and inertial vehicle track, no battery is required.   2、Valuable to Buy: Construction Engineering Toy Sets have different designs and functions, including race tracks, helicopters, bulldozers, mixer trucks, elevators, tower cranes, backpacks, etc.   3、Improve Comprehensive Ability: 2-in-1 track and cooperative games bring more fun to children than a traditional single track. Children can pretend to use these trucks for various construction work and spend hours playing creative and imaginative games.   4、Unique Storage Bag: The storage box is an engineering bag with a storage function and can carry construction toys. Construction Toys are very suitable for homes, schools, parties, picnics, etc.   5、After-sales Service: Let you have a pleasant shopping experience is our goal. If you have any questions or suggestions about Construction Toys, please contact us in time. We will provide you with a better solution.   Description:   2 in 1 Orbital and cooperative games bring more joy than traditional monorail games and guide the toy car to overcome obstacles every challenge, which is very suitable for training and improving children's motor skills, problem-solving, and hand-eye coordination. Children can experience the excitement of victory and enjoy hours of fun. The engineering truck race toy is the perfect gift for children.      Function: Without battery, children need to do it by themselves, guide the toy car to overcome obstacles, and challenge every challenge. Help young children develop cognitive skills, train children's logical thinking skills, and improve their imagination.