Found: One felt sheep stuck to the Velcro on my daughter's butt. I believe she was attempting to smuggle them out of the children's museum one by one, until she had an entire set of farm animals at her disposal. Busted. Unfortunately for me, busted at home, after the crime had occurred. I will have to smuggle it back in next week.
It is slightly genius on her part. Not that I would ever consider using this to my advantage. For example, I would never let her crawl through my favorite stores, just to see what sticks.