Diapers only work when gravity is working with them. For instance, if you're holding your baby upside down, and he decides to poop... Poop may splatter at your feet. And a little bit of urine might just trickle down on top of that. Just maybe.
While we were packing, Oliver found a book mark that contains a piece of the Berlin wall. He will crawl towards it no matter where it is. He just loves history, I guess. What a cultured young lad.