Following the successful model of ''Me on the Map,'' Sweeney demystifies an abstract concept by presenting it from a child's point of view. In ''Me and My Family Tree,'' a young girl uses simple language, her own childlike drawings, and diagrams to explain how the members of her family are related to each other and to her. Clear, colorful, detailed artwork and a fill-in family tree in the back help make the parts of the family--from siblings to grandparents to cousins--understandable to very young readers.