Photo Guest Book. We did this for my aunt and uncle's big anniversary party, but with a photo printer instead of a Polaroid. All the pages were black and the guests used glitter pens to write with. It was classy and a good keepsake. Definitely want something similar for my wedding.
Every guest puts their fingerprint on the tree and signed their name. At the end of the ceremony, the bride and groom added their fingerprints on the swing hanging from the tree. Adorable, replacement for a guest book!