Our Flappy Suit onesies are loose-fitting, wanda and vision costumes and they allow for your little one to have a perfect flexibility when it comes to movement. Flappy Suits are ideal when it comes to a Halloween costume, a kids cosplay costume, or even if your little one is looking for animal PJs that they wear to bed each night. EASY-TO-WEAR: Wearing a cumbersome Halloween costume can make a child exhausted by the end of the Halloween night.