That reminds me. When we go to the Micky and friends parking structure and get one of those green "A" papers (for handicap parking), and when we are leaving I take it off the winshield. I then fold it in half, tear out a hole, open it up and ask our guests what it is. Yes, an A-Hole!
Try it after a long day at the park, it will get a giggle for the most part.