Heck yeah you're invited! A list of people and addresses. If you send them an invite, they will send you a congrats letter IE the Queen, President, Cinderella, Mickey Mouse, etc. This includes and address for JK Rowling. Guess who's getting invited to my next birthday party?
Take a ticket stub, plane ticket or whatever to kinkos, have them blow it up, print it on fabric transfer material to make a pillow. This would be so fun for big trips or things done as a couple (honeymoon tix, first concert together, etc)