Now kids can learn anatomy and have dinosaur action fun, too! this large-sized T. Rex has one removable side that allows kids to see how the inner anatomy of the T. Rex functions. By using the “DNA” key, kids can move the leg to see the muscle Flex, see the heart and lungs pump and activate it to open its large mouth and roar! then double the fun by placing the dinosaur half back on the T. Rex and play out action-adventure scenes from the movie! includes T. Rex figure with removable side. Colors and decorations may vary.