And they self-assemble too.
From the researchers who brought us Inchworm here comes new self-folding small robotic beast. Sam Felton and colleagues from Harvard and MIT developed this more complex robot that can go from flat to folded and walking in four minutes without any human intervention at all.
Source and more details:
http://spectrum.ieee.org/automaton/robotics/robotics-hardware/self-folding-printable-origami-robot
As always, I welcome our new robotic overlord.
See more on 4d printing here:
http://diy3dprinting.blogspot.com/2014/06/some-updates-on-4d-printing-and-baking.html