Disney Autograph Books
Using a 6x12 piece of cardstock, I printed their names and folded it in half. I also cut white copy paper (6x11) to go inside. Sew down the middle, and you have an instant book with however many pages you want in it.
Don't spend big bucks on a book you have to buy there! These are flat enough to fit into an album later, and can be personalized for almost free!