Baa Baa Black Sheep, have you any . . . songs? Children love to sing and be sung to, and these perennial tunes are always top the kids’ hit parade. Little ones will love the repertory that includes “I’ve Been Working on the Railroad,” “Pop! Goes the Weasel,” and “Row, Row, Row Your Boat.” And some—like “Itsy Bitsy Spider,” “Pat-a-Cake,” and “If You’re Happy and You Know It” are more than just fun: they develop physical dexterity and teach parts of the body, too. All the songs are great for entertaining restless youngsters on car trips, during play dates, or on a rainy day.