You"ll be amazed to find what you can learn because after you havecorrectly assembled the Greenex collection you will master the basicknowledge of modern mechanic and electronic. The Greenex series is anexciting learning experience, and is smartly designed that it is easyto build it yourself. Most importantly, the main concept of thiscollection series is environmental protection. Children will be amazedto use the solar power to operate the product. The Greenex series istargeted at encouraging children to learn how to protect and lookafter the enviroment. Therefore, children can discover and play in anecofriendly way.Build your own solar powered house with this great kit. Solar ecohouse operates on natural sunlight, or batteries when indoor. See themagnificent house come to life with Solar LED sign display, solar doorsound and solar windmill. This kit is perfect for kids 12+.