-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. You will need a small cross Head screwdriver and 1 AA battery (not included) -Recommended for ages 8 and up