Despite the age recommendation that this is for an 8yo, we bought it for my 5yo daughter because she loves her "bones book" and is pretty good about repeating back the right words for bones and organs.  Plus the "squishy" nature of the organs makes her laugh.  The pieces are a little flimsy though, and some of the bones don't snap back into the plastic "body shell" like they should, and they fall out.  Overall it's a good learning tool and she loves it.