Need Good Ideas for Kid’s Summer Fun Things To Do. Have a backyard or neighborhood Pirate costume Treasure Hunt. Parents and Kids dress up and have fun. Once you have a great costume from Dallas Vintage Shop, get everyone to go to Six Flags or Chuck-e-Cheese or your favorite park or restaurant in full costume. Kid’s love this kind of simple fun. Let every Summer have a different costume theme. Make it fun and educational by choosing a different decade or century every year and have many activities, trips or parties dressed in your themed costume each Summer. Start a unique family tradition.