After Sam’s baby brother visits Mr. Judd’s class, all the children bring their baby pictures to school and have a good time guessing which is whose. But there’s still one picture left over. . . . It’s Mr. Judd! Now the children can imagine their teacher as a baby (complete with mustache). The idea that everyone starts out as a baby—and that babies and kids become grownups—is conveyed with a light touch in this sprightly school story, which acknowledges young children’s fascination with babies and with the idea that even the most revered grownups used to wear diapers. Readers will want to play “Guess the Baby” in their own classrooms.