| My son used to do it a lot as an infant when he was tired.  He would also sort of "chant" while he did it and you could see that it's almost like meditation.
 He's a pretty sensitive child so I think it's mostly about shutting out other stimuli.
 
 He's five now and does it much, much less; only when he's way overtired.
 
				__________________Building an artificial intelligence that appreciates Mozart is easy.  Building an A.I. that appreciates a theme restaurant is the real challenge - Kit Roebuck - Nine Planets Without Intelligent Life
 |