You-Build-It RoboXplorer. With RoboXplorer, kids build their very own multiterrain robotic vehicle, complete with six S-shaped legs designed to conquer some of the toughest terrains, such as sand, rocks, and grass. Test its limits by towing toy cars, climbing a stack of books, or negotiating a wall. RoboXplorer will stop at almost nothing! Includes instructions for 5 guided projects that touch upon the science of motion and energy to explain why RoboXplorer reacts differently to various terrains.