Learn anatomy and have dinosaur action fun, too with the Jurassic World STEM Tyrannosaurus Rex Anatomy Kit! Large-sized Tyrannosaurus Rex has one removable side allowing kids to see how the inner anatomy of the Tyrannosaurus Rex functions. Use the "DNA" key to move the leg to see the muscle flex, see the heart and lungs pump and activate it to open its large, iconic bite! Place the dinosaur half back on the Tyrannosaurus Rexfor double the fun and play out action-adventure scenes from the movie! Includes Tyrannosaurus Rex figure with removable side.