Quite a trick to consider:
Harvard Building Swarm of Self-Folding Origami Robots
One of the challenges with swarms of robots is manufacturing and deploying the swarm itself. Even if the robots are relatively small and relatively simple, you're still dealing with a large number of them, and every step in building the robots or letting them loose is multiplied over the entire number of bots in the swarm. The dream for swarm robotics is to be able to do away with all of that, and just push a button and have your swarm somehow magically appear. We're not there yet, but we're getting close: Harvard researchers recently demonstrated a collective robot swarm that can be manufactured in a single composite sheet. On command, they'll rip themselves apart from each other, fold themselves up into origami structures, and head off on a mission en masse. ... "