Most of his mesmerizing sculptures are made with just cardboard, glue, and a knife. Warren shows us how to build our very own robot helmet, using the techniques he's perfected throughout his career.

You don't have to assemble it yourself; the little plastic robot will be ready to go out of the box with an included remote control.

Learn how to make a robot using recycled materials in this BBC Bitesize guide for Reception.

DARPA was quickly humbled. Scharre writes that all eight Marines were able to defeat the robot using techniques that could have come straight out of a Looney Tunes episode.