Here is a first documentary on the body very well. It is for children from 4 years but I think it can be used throughout the primary for a first approach. It works on the principle of the flaps to lift and has lots of information on the functioning of the body. My older than 8 years is not at all interested in the subject and this book is a good way to get him to think about it because the designs are playful and not too anatomical what he does not like. The price / quality ratio (about 10) is still on top at Usborne!
