I would assume the little fellow was likely thinking he was being a good boy and cleaning his face. I can see my own small son doing that. It's amazing how fast they get into things and how inventive small kids are.
Yep Jeanne I've used these since they came out and figured they were the safest cleaning product to have the kids help me clean with (or clean up after they've scuffed the floor or doodled on a wall or whatever). Of course a parent knows that they must have some cleaning product in them or they wouldn't work but when no warning label is apparent you expect that it's likely pretty safe stuff compared to the other cleaners available in the normal household.