From www.youtube.com - May 29, 2012 11:19 AM

MIT researchers present a digital fabrication technique for manufacturing active objects in 2D from a collection of small robots. Part of the paper, "A Distributed Algorithm for 2D Shape Duplication With Smart Pebble Robots," by K. Gilpin and D. Rus, presented at the 2012 IEEE International Conference on Robotics and Automation.