THE BONES BOOK AND SKELETON is the extraordinary bestseller with over 1.75 million copies in print! 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. This is a great gift for every kid, one that truly brings science to life.