Wow! I just came across this recent work from a research lab in France. As you can see in the video, the robot moves a bit like a child -- it's pretty cute.
Their robot has structural stability due in large part to their use of *drumroll* rubber bands! I like that their components are cheap and off-the-shelf. It would be cool to try and reverse engineer it... or I guess we could just ask them for the schematics... hmm...
Of course, some people still find it creepy. One girl told me it was as scary as puppets.
https://www.youtube.com/watch?v=wQ9xd4sqVx0?fs=1