For a little background - Emma spends a lot of time in her playyard. It takes up about 1/3 of our family room, but its contained and has all of her toys so I don't have to worry about her getting hurt or roaming the house, and she loves to play in her yard.
Anyway, we have two books of puzzles. She has managed to pull most of the pieces out of the books. Just this morning, I cleaned up her yard and took all of the puzzle pieces and the books and put them on the coffee table.
I put Emma in her yard after picking up Michael from school. As I am on the phone, I look over to watch her pushing the wall of her yard and walking towards the coffee table - she has figured out if she pushes hard enough, she can actually move her yard around the room - she has now moved it close enough to the coffee table to pick up the pieces of puzzle and throw them back into her yard.
Like I said - too smart for her own good!