The mutated Jurassic World Tyrannosaurus Rex measures 46cm long! This angry dinosaur bites with a vengeance using push-button chomping action. It also has pop-up spines and an electronic roar embedded in his thick green hide. This Jurassic World Dino Hybrid T-Rex also features articulation in its arms, and legs. Requires 2x "AAA" batteries, included. Ages 4 and up.