Ice Cream potluck.... we'll provide the ice cream and you bring a topping. Cherries, coconut, strawberry sauce, chocolate chips, gummy bears, banana's, strawberry's, etc, etc. Be creative. Will probably have a little bit of something else to eat so everyone doesn't just have a sugar high. Depending on the weather might do a bonfire, play some sports/games, devotional, etc.
Have a great day