The little guy has been wanting to name body parts and systems as of late. Perhaps his interest is due to the fact that I want him to be the next Doogie Howser and practiced the MCATs with him. So far his knowledge is pretty basic mostly bones and asking if our dog has a body. Usborne Beginners has a book called, Your Body and it uses a combination of drawings and photos to depict the different systems in the human body. For example, breathing is demonstrated through both a balloon cartoon and an MRI image of real lungs. The explanation of body processes uses sentences that while simple actually gets the point across. I think some of the things in the book are a little above LTD’s paygrade and while we aren’t anywhere near Doogie Howser levels, the other day he did ask me what the esophagus did.