So can: a hairbrush, a candlestick, a celery stick, a paintbrush, a popsicle, a spoon, someone else's arm, your own foot, a flower, an uncooked spaghetti noodle (Bob Barker/The Price is Right-style), a rolled up magazine, a maraca....But you probably already knew that too.
My 5 year old sings the blues. (Not really, but I thought that sounded funny.) I do sing classic hits with her from Diana Ross & The Supremes though. And the Beatles.
Nursery rhymes are overrated.
(P.S. She starts Kindergarten today!)