Don't mind the quality (or lack of) of these pictures. They are from my cell phone.
Over the course of just a few weeks, I've taken at least 10 different pictures of my boy in some type of box. The kid loves boxes. He, occasionally, tries to get in some that are a little too small, (Like the block bin at the dr.'s office.) or some he shouldn't be in (like the kitchen drawers). He just loves to be in a box.