‘The Old Man and the Old Moon’

The moon and the man may be old, but the performers are young: freshmen friends from the Carnegie Mellon School of Drama who have gone on to form the PigPen Theater Company. Using puppets, original songs and a folkoric sensibility, they’ve created a 90-minute show for children 7 and older that captures the odyssey of their title character: an elderly gentleman who keeps the moon filled with liquid light — until his wife disappears, and he has to find her.