http://www.engadget.com/2011/06/21/kiro-robot-teaches-korean-kindergarten-by-day-discusses-kandins/ All very well and good -- until I got to "When he wasn't busy dishing out Ritalin to his underlings, Kiro also served . . ." I hope that's a joke!
Also, kindergarten-age children are prone to everything from skinned knees to tantrums to fits of separation anxiety to more serious things that require immediate attention by knowledgeable adult human beings. So where are the human beings?
I think this needs a re-think.