This animation TV series is simply the best way for children to learn how the human body works. Yes, this is biology but they will never tell it is.I truly think this is the best part of this stream of "educational cartoons". I do remember you can find little books and a plastic body in several parts: skin, skeleton, and of course: organs. In the same stream, you'll find: "Il était une fois l'homme" which relate the human History from the big bang to the 20th century. There is: "Il était une fois l'espace" as well (about the space and its exploration) but that one is more a fiction than a description of the reality since it takes place in the future.