Easy build-it-yourself space robot powered by the sun! Learn about solar energy and solar panels. Operates on natural sunlight or on batteries when indoors. Robot comes to life with LED lights and back and forth movement. Eco-friendly toy for hours of learning. For ages 8+ The Greenex Series is 100% battery-free eco learning fun that connects the environment to amazing science experiments.Smartly designed, each Greenex kit allows kids to snap the pieces together with ease. Simply snap all key components and modules together to start and then pull apart once finished. Encourages kids to experiment on their own for additional learning. Best of all, each kit can snap to another to integrate functions and double (triple, quadruple) the fun!