100% Brand NewEducational DIY solar kitNew energy source， good environment protection， handsome appearance and vivid.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.It can easily make it up for tank， the robot， and the scorpion.It will not run on a cloudy day or a shaded location.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.The toy only for kids Age 10+Note:This product contains small parts not suitable for children under 3 years.