From Matt Kirkland's site:
I've always been curious about stuffed animals that sing, dance, light up, or talk back. There must be a fascinating robot underneath the fur and fluff, right? Surely the robot hiding in the bear's clothing, vestimentis ursum, is impressive. So: armed with my childish curiosity and the spurious excuse of 'product design research,' I set out to discover what, exactly, these creatures are hiding.
Here is a link to the photo set of the robots beneath the fluff.
[ Thanks Bob! ]