My soon-to-be sister-in-law had a great idea for her guest book. She had her engagement photos made into a photo book that will be at the wedding for guests to sign with a silver marker.
There is plenty of black space around the images for guests to leave messages.
It is such a great way to make use of engagement photos, which often get forgotten after the big day.
I plan to reuse her idea, but I think this would also be a great idea for a birthday party or wedding anniversary.