Creative, unique, and easy to create ideas that you can use to assemble the perfect family look. Get ready to have some fun this Halloween and check out this amazing list of 32 creative Halloween costumes for families that you're sure to love! DIY Group costume ideas to assemble or make for Halloween. Halloween costumes for 4. DIY Costumes for family of 3. Toddler family costume ideas for groups of 5 that are so fun!