It's the largest human organ and keeps everything else is place—what is it? It's skin! And there's a lot more to it than meets the eye. In fact, microscopic bugs, fungus, and bacteria may all be found on the skin. Readers travel across this large body part with some helpful, friendly kids who narrate the whole journey and impart essential facts about the human habitat of the skin. A colorful design, complete with graphic organizers, complements the conversational style of the text to be sure readers comprehend the simple explanations.