While at the MIT Media Lab Hayes invented Topobo, a construction toy with kinetic memory, the ability to record and playback physical motion. Since 2008 he has managed Topobo Co. as founder and principal.
With Topobo, you can snap together Passive (static) and Active (motorized) components to invent your own Topobo creature and animate it by pushing, pulling, and twisting its body. For example, you can make a dog and then teach it to dance and walk by twisting its body and legs. With the push of a button, the dog will dance and walk by itself. The same way children learn how buildings stand by stacking blocks, they can learn how animals walk by playing with Topobo.
Watch the Topobo video.