See "Toddler learning to walk" at http://groups.csail.mit.edu/locomotion/videos.html http://groups.csail.mit.edu/locomotion/videos.html (2004). At first, the r

See "Toddler learning to walk" at http://groups.csail.mit.edu/locomotion/videos.html http://groups.csail.mit.edu/locomotion/videos.html (2004). At first, the robot walks passively down an inclined treadmill. But it quickly learns how to efficiently add just a little bit of power from its motors at the right time each stride, such that it soon walks on level ground and adapts to different surraces.