Introducing the Jurassic World T-Rex Inflatable Costume for kids! This amazing costume will have your child looking just like the ferocious green t-rex from Jurassic World. The costume features a battery operated fan that inflates the costume in seconds. The battery pack fits into a pocket in the right side seam, so your child can stay comfortable while they trick-or-treat or play. The dinosaur face and teeth are shaped and printed on the head, making this costume truly realistic and so much fun! The Jurassic World T-Rex Inflatable Costume requires 4x AA batteries (not included).