You're going to think this is silly. Don't laugh, okay? Pop-up books. Seriously! When I was a kid I couldn't get enough of them. Opening a book and finding a little three dimensional world inside. Or tabs that you could pull to make parts of the page move or open or expand. God, I love books. All kinds of books! I read just about anything I can get my hands on, which isn't easy. Most books were used for fuel long ago. Every now and then I get lucky and find one intact. Pop-up books are my favorites. There are even fewer of those around, so when I do find one, it's like finding buried treasure.