It\\\'s a moving robotic hand that comes in kit form, meaning you have loads of fun building it and even more fun playing with it! It\\\'s made from 203 easy-to-assemble pieces and uses hydraulic power to move. Use the adjustable settings and watch how the system is able to move each finger. It\\\'s powered by hydraulics alone. No batteries or motor is needed! It\\\'s loads of fun, but it\\\'s also a fantastic STEM toy that teaches you about mechanics and engineering.