Where did that diaper go?

The other day I was reading my emails and the kids were playing around my feet. I looked over and noticed Lily was standing on the little chair with a naked bum. I asked her where her diaper went and she gave me a big smile. I went and looked all over and couldn't find it. So, I opened the door to the basement, there at the bottom of the stairs I found her diaper. She must have gotten sick of it and chucked it down the stairs to hide it from me. Silly Lily!