The Marvel Avengers Iron Man Mega Hydraulic Arm lets you build a multi-axis robot arm powered by water! Experience the science behind hydraulic power as you create a system that converts existing energy from one from to another. Assemble your mega machine with power gripper, decorate it with Iron Man stickers, then use the arm to pick up different objects using the 4 precision lever controls! It's a wonderful example of using kinetic energy, produced by the movement of water, to power the rotation and different arm movements of your Iron Man machine! There are 21 steps to follow to build your machine from start to finish, with a picture diagram to help you with every step.