When the mask jaw is opened quickly there's an iconic T. rex roar and dilated pupils. Realistic look straight from Jurassic World Rebirth. Activate 3 levels of Rage 'N Roar aggression. Open Jaw to activate eyes and growl. The wider the mouth opens the more fierce and aggressive the light-up eyes and growls get. Mask features LED blinking eyes ferocious teeth and a soft growl. Adjustable strap in back keep the mask snug and securely attached. Eye and mouth openings allow comfortable wear. Requires AAA batteries (included). For ages 6 years and older.