Even though your child isn’t muscular, he can still be Mr. Incredible from Disney/Pixar’s The Incredibles. How the Disney costume would work is that you’d need to find a jumpsuit or onesie with a “built-in” muscle piece. That way, your child will be able to pull off the muscular, hotshot look as Mr. Incredible. Don’t forget the black eye mask either – that’s probably the most important accessory of the Disney costume!