This Hulk costume will make your kid light up, literally! This costume includes a light up polyester jumpsuit that has foam muscle definition. The chest has small lights in it that pulse which are activated with a switch inside the jumpsuit next to the chest. The back has a Velcro opening and elastic around the waste to keep the costume comfortable while worn. The jumpsuit also has tattered pants attached to it to create the look of recent transformation. Also included is a PVC half mask that is worn with an elastic band that goes around the head. The mask also features a realistic paint job and eye, nose and mouth holes so your child can wear it comfortably. No need for gamma radiation to get your kid to Hulk out!