One popular option we offer, especially for birthdays and weddings, is a photo scrapbook / guestbook. After each photo session, one copy of the photo prints is placed in a scrapbook and guests are encouraged to leave messages and well wishes by their photos.
We provide the book, the adhesive, the pens, and the supervision to make sure the book looks neat and organized. The photo scrapbook can actually be used as your wedding guestbook, too. This is a lot more fun and interactive than a typical wedding guestbook.