Solar power fun! Build your own amazing eco-friendly robot powered by the sun with a 360° adjustable solar panel or handle generator. 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! Details:Multicolor14.29" x 2.76" x 10.83" package sizeSolar powered and battery freePieces snap together with easeRobot moves forward and backwardWorks together with other Greenex kits (sold separately)For ages 8 and up