You don’t need to go fancy with Wendy’s blue dress. The more important part of the Disney costume is to actually portray the sweet girl from Peter Pan’s Neverland. You’d have to act as the girl who doesn’t want to grow up, and who just wants to have fun. Of course, to completely absorb the character, make sure Wendy’s dress is in a bright blue color that flows long to her feet. Take note of the puffy sleeves also. And you’d need to set your hair in a ponytail and finish the costume with a big blue bow. Most importantly, have fun!