Kids love to play dress-up and what better time to do this then their birthday party. allow them to wear a costume or other clothing items that go along with the theme of their party. Such as if your daughter is having a Cinderella party let her wear a Cinderella costume dress or T-shirt with Cinderella on it or maybe your son is having a Spider man party same idea as Cinderella allow them to wear either an actual costume or fun T-shirt.