Explore mechanical engineering principles as you assemble and play with 6 mechanical models of the types of arms, grabber claws, and legs found on robotic machines. The models use a pneumatic system which uses air pressure to activate the models. Construct a pivoting robotic laboratory arm with gripper claw. Assemble an extra long grabber claw to pick up things that are just out of reach. Step-by-step illustrated instructions for these and many more builds.