Solar Robot Creation KitDevelop your engineering skills with over 14 unique solar powered robots that crawl, roll and even float! This DIY kit has 191 pieces and even has back up power included. No batteries needed! This robot has the ability to become a tracked robot, snowcat, tractor, crane, sports robot, go kart, train, snowmobile, tricycle, mech robot, robot dog, jumping car, scout robot and a crawling robot. The possibilities are endless and fun for the entire family.