The Solar Fun 6 building toy contains unique components and parts to construct solar robots that operate on land, water and in the air. Construct six different solar-powered robots, each having a unique functionality. After assembling a robot, young engineers can easily reassemble components into a different robot.6 robots include: Windmill, Revolving Plane, Plane, Car, Puppy, and Airboat. Tools that might be needed: diagonal cutters, safety glasses. Elenco Teach products are based on STEM activities (Science, Technology, Engineering, Math) to teach and encourage kids in their development, all while having fun! All Teach Tech Green-Energy robots are powered by either water, wind, or sun, so there are no batteries required. Perfect for future engineers ages 8+.