Build five out-of-this-world robots that are powered by the sun — batteries not required! First assemble the main robot, Helio, complete with solar panel, electric motor, and gear wheel. Then construct four space exploration vehicles to help Helio travel around the universe. As you quickly move Helio from one vehicle to another, the gears click into place, and the compact solar panel instantly begins converting sunlight into electricity, which powers the electric motor. Ages 6 with help, 9 I got this!