Great visual aid!  Got this for 10 yr old grandson, who is heavy into skateboarding and dirt bikes, so I was taking a chance. He tore right into it, pretended to be grossed out, played exclusively with it over all the other Christmas gifts, and actually said to me, "This is the BEST toy I've ever gotten!"  His 11 yr old brother was also very interested in it. The book is informative and easy to understand, the parts chart, with descriptions of each organ, was very helpful.  I'm ordering a second one to keep at my house so we can interact with it together when he's here, to enhance the learning aspect of the toy.  It's a wonderful "sit at the table and play alone" kind of toy.