Monsters

I have been noticing that our house must be haunted, or possibly we have some invisible monsters that only come out when I'm not in the room (I guess they wouldn't need to be invisible then....). Whenever I go out of the room after folding a load of laundry, I come back and my piles are destroyed. Since I know that my kids would NEVER be messy or make extra work for me, I have concluded that, like I said, our house must be haunted with some angry ghosts.