ball moving creative solar toys diy toys children assembled scientific experiments favorite track ball toys for children kids ing

product name: solar track ball package size: 22.5 * 18.5 * 7.5cm finished size: 19814 * 16cm under sunlight, it can convert light into kinetic energy, and promote the upward movement of the ball. you can exercise the child's ability, very interesting. age: children under 10 years of age. hands together and parents can install.