Two - the invite!
So I do 5x7 photo invites for the boys bday parties each year - they usually coordinate with the theme of the party, and each's interests at that time. I love doing them and it's fun to keep in their memento boxes for the year, and I even have evan's fifth bday invite framed in his room.
This was Noah's from last June - when he was LOVING dinosaurs - and we had his "DINO-ROAR" party (lots of pics from it on my blog!).
I used washi tape to attach the invite so that it could easily be flipped later and the backside would be viewable.
TFL! -S :)