A TOY (paper) ROBOT!!!!!.
Roll Fold your own giant paper robots! Many delightful designs, including the Whale-Copter(?), the Kanga-Bot, and a suprisingly familiar little guy. Hours of fun, at least until you pass out from blood loss following massive paper cuts. (Link courtesy Pixelsurgeon by way of Veer.) [MetaFilter]
origami and robots, that's two tastes that go great together!