MIT researchers are at it again. This time, a joint research team with TU Munich has developed a self-folding origami robot capable of a range of tasks. The robot can even self-destruct after it completes its mission. The tiny device starts completely flat, and is made from ultra-thin laser-cut polystyrene layers that sandwich a magnet and PVC. The self-folding process is instigated by placing the tiny machine over a heating element. The PVC then contracts along the laser-cut lines, creating folds. The robot weighs only 0.31g and is 1.7cm long, laid flat. It can "walk" at a top speed of 4 cm per second.