You will need a small cross Head screwdriver and 1 AA battery (not included) Recommended for ages 8 and up Learn about the wonder of robotics with the 4M Table Top Robot. The 4M table top robot introduces STEM mechanical and robotic engineering concepts through an entertaining and accessible science kit Kids build a scuttling mechanical crab that gets close but won't fall over the edge Easy to assemble, This robotics kit gives kids a real hands-on opportunity to build their own moving robot Includes components, accessories and easy-to-follow instructions. The Table Top Robot is a hands-on science kit that teaches the basics of robotics by constructing a working robot crab.