Muscle madness! This very special Tyrannosaurus rex figure has a new and exciting feature never before seen -- her neck, shoulder and upper back muscles actually expand, to make her an even fiercer foe! Roarrrrrr! In conjunction with the spectacular muscle growth, the figure has a ferocious chomp and roar! Button-activated. The front button activates the muscle growth and chomp and roar. The back button activates more evolution -- the spikes along the tail expand to provide a ferocious defense. T. rex forever! This species is a fan-favorite and this edition, with its innovative features, authentic design and posable joints, will add a unique twist to any dinosaur collection. 4 years and up! This 21.5-inch long Tyrannosaurus rex figure is suitable for Jurassic World fans 4 years and older. Scan and collect! Scan the code on the dinosaur's foot in the free Jurassic World Play App with a compatible smart device (not included) for AR activities and to build a digital dinosaur collection! Ride 'N Rampage: Colossal Chase! In the app, race vehicles on land, in the air, and across the sea while playing an exciting shooting game to extract dinosaur DNA!, Manufacturer: Mattel