The 12-inch, 24-piece skeleton is realistically designed with moving joints, and can be displayed in its clear plastic bell jar. The book is packed with projects, experiments, and facts about all the systems of the human body. The focus, of course, is on the bones—what they are made of, how they grow, how they work. New is an expanded section on paleontology and fossil remains incorporating the latest news from the field, including the newly discovered hobbit-sized humans from the last Ice Age. Suggested ages 6-12.