Step 1: Constructing the base

The base is probably the simplest part of the robot to build. It's just a platform from the robot to stand on. You have to make sure, that it's long and wide enough. The center of gravity must be somewhere on top of the base, if possible, in the middle. Else wise, the robot will fall.

The base (in our case) are just a few beams that support the robot. More advanced robotic arms have motors in the base. These motors than move the arm, without moving themselves. Usually, the base has a motor that rotates the arm, but my arm rotates itself.

You can be much more creative with the construction of the robot then I was.