Build a wonderful solar powered steamship, car, puppy, windmill, airplane with this DIY solar powered toy kit. Explore the principles of solar energy and stimulate creativity with 21 different components, including solar revolving planes.This solar powered stem toy is suitable for children to practice hands-on skills and learn the benefits of using solar energy. It is a great building toy to express your interest in science, cultivate creative thinking and enhance your brain ability Use the power of the sun with these interactive solar powered toys. No external power or battery required. Discover science in a fun and attractive way!