The Uncover series combines the best elements of a book with model elements to help readers truly "uncover" the mysteries of what makes things work. A fascinating three-dimensional presentation allows in-depth, hands-on exploration of the subject at hand. This unique "model" is easily built, deconstructed and re-built layer by layer, system by system just by turning a page, until an understanding of the topic is achieved. The complexities of the human body can be daunting, particularly for children. This book-model combination takes some of the mystery out of how the body works. It covers all the major systems and processes. Children get to look at each system on a different page, then by closing the book, combine them into a whole.