How to Make Hydraulic Powered Robotic Arm from Cardboard In this video I show you how to make robotic arm from cardboard, it's quite fun to plaw with. Especially by moving coca cola cans. You need: ...

Hunched over a desk, squinting as he shoves some multi-colored wires into a breadboard, Nestor Rios shyly explains his invention. Well, it’s less of an invention, and more of a solution, Rios says.