Unlike silly songs for children by, say, Raffi, or maudlin songs for parents like Dylan’s “Forever Young” or Cat Stevens’s “Father and Son”—two ballads eager to preserve their singers’ sons in amber—Paul Simon had genuinely intergenerational appeal. He shared with us young passengers the joyful and terrible news of adulthood with patty-cake rhymes (“mama pajama,” “drop off the key, Lee”) and jaunty rhythms, scored by a panoply of ludicrous and wonderful-sounding instruments—from the hooting cuíca in “Me and Julio Down by the Schoolyard” to the triumphant parade drums of “The Obvious Child.”