Wedding game/activity (between ceremony and reception?) make stamps w. meaning and either do some sort of letterbox thing or have activities stations, complete an activity to get the stamp, goal is to get all the stamps etc.
Cool project for the Black Lagoon Series of Books. "The Class from the Black Lagoon" kids can make their own monsters. I think you could use a paper plate and paint it, cut out and glue eyes and teeth (Dog Diy Projects)