Let your child become the most infamous, dangerous dinosaur of them all with this amazing kids' inflatable t-rex dinosaur costume. This is easily one of our most popular costumes and it was even a viral hit online, so you can rest-assured that this amazing piece of fancy-dress will see your child take any party or event by storm. To get the kids' inflatable t-rex dinosaur costume ready for action, simply step inside and turn on the inflating fan (requires 4 x AA batteries, not included).