Detachable organs and body parts allow for model building. Cutaway design allows viewer to see internal structures. Highly detailed finish and coloring deliver superb quality. Includes illustrated booklet with organ function and description of the animal, and a display platform for showing off your model. All Dinosaur models were overseen by Professor Dong Zhi Ming an International authority in Vertebrate Paleontology and Paleo-anthropology to confirm their accuracy. 39 pre-colored pieces Includes fact guide and step-by-step illustrated assembly instructions Features skeletal structure and internal organs Stands 22" high Assembly required Ages 8 +