Scale Model Kits features: Interesting geographic teaching tools for teachers to use. Help students to understand the movements of solar system. When you have a geography class, you can use the earth as a map. Suitable for teaching in science class by using this product. Features Color: Random Ball color Material:Plastic Size:20.00X12.00X7.00cm/7.86X4.72X2.75in The model can help childs astronomy class better understand moon phases, eclipses, season, etc Multiple moving axis on this gear driven model to demonstrate daylight, night, seasons, solar-eclipse, lunar eclipse and phases of moon A great kit to encourage children to explore solar system, while being creative and using their imaginations to have fun DIY your own sun earth moon orbital planetarium model with this creative kit Encourage children to learn the knowledge of astronomy with this interesting educational instrument.