LUCKSTAR&reg; 3-in-1 Solar Robot, DIY Assembling Solar Power Educational Science Robot Model Kit Birthday and Christmas Gift for Children and Kids Robots: 8.7 * 6.3 * 10.2 (CM); Scorpion: 13.5 * 10.2 * 10.2 (CM); Tanks: 7.5 * 9.5 * 5.7 (CM) Educational DIY solar kit, new energy source, good environment protection, handsome appearance and vivid. It can change into the scorpion, robot and tanks. And inspire your infinite ideas. This kit enlightens your kids in the utilization of the available energy and to learn about the environment benefits of renewable energy. Allowing young builders to focus on self-motivation, Perseverance and manipulation. When play under direct sunlight, the robot will be on the best state of running. If you want to play in door, you should use a 100 watt halogen light. Keep small parts out of the reach of children under 3 years old. l Read the manual before setting.