This little piggy went where?

LL LOVES to read books each night before bed. Some of her favorites are the "touch and feel" books. One night while we were at the beach, the mister was reading her a book about farm animals and she discovered a part of the book that she had never noticed before--something that moved!!
She had stuck her foot in the cut-out which is in the front of the book- and just couldn't figure it out. It was too funny!!