Wizard of Oz Family Costume - 2015 Halloween Costume Contest
Family Ninja Turtle DIY Costume - cute and frugal costuming for the win!
An Incredible Weekend + Easy DIY Incredibles Family Costume - Fresh Mommy Blog
Goldilocks and the Three Bears web
Fairy Godmother, Gus Gus, Cinderella, and Prince Charming Family Costume. Well that's not completely precious at all.
more family costume ideas