Also on these boards
Drive-in movie party. Rent a film projector and use a large screen (the back of a pool or just a strectched out sheet). Make the little cars out of cardboard boxes. The kids could even decorate their own cars as part of the party.
Have a backyard drive-in party for the kids with cardboard boxes.
Host an outdoor movie night this summer!
Up Movie Inspired Birthday Party
must get for the backyard --> The slackline is GREAT for core strength and tons of fun!