This DIY Science Experiment Toy is perfect for children who and explore. With its three-ball design, kids can learn about the movements of the Earth, Moon, and Sun while also developing their logic and problem-solving skills. Parents can join in on the fun and bond with their children while completing the assembly and conducting experiments. Features -Color:Khaki -Material:ABS, foam, metal -Size:12.00X12.00X10.00cm/4.72X4.72X3.93in -Note: Not included battery -Note: this is diy solar system model, need to be assembled by yourself. - This Solar System Model can help your child's astronomy class better understand moon phases, seasons, and more. - Encourages hands-on learning and problem-solving skills: this product promotes active learning and the development of problem-solving abilities. - A great kit that encourages kids to explore the solar system while having fun with their creativity and imagination. - With this creative sun-earth-moon three-sphere kit, you can DIY your own sun-earth-moon orbit planetarium model. - Encourage children to learn astronomy intuitively with this funny science project tool. Package list: 5 x Set of Solar System Model