Kilobot Swarm

A research team of roboticists built 1,024 robots called Kilobots and programmed them to gather into the shape of a star, the letter “K,” and a wrench. Each Kilobot is the size a penny, costs $14 in parts and only takes a few minutes to put together.

In the future swarming robots might work in the same way as 3-D printing and could form whatever three-dimensional structure you want.

More: WIRED
Read about Kilobotics here

Thanks, Bruce!