Who is Kid Brother - Randy from Wanda Hickey's Night of Golden Memories and what is their importance?

The Grandstand Passion Play of Delbert and the Bumpus Hounds refers to Randy as the kid brother who constantly whines.

County Fair! continues with the whining theme as well as sobbing when he does not get his way. This manipulative behavior is continued throughout the day at the fair where he manages to wheedle not one but three taffy apples out of his mother in return for accompanying her to the exhibits she wishes to see. The kid brother eats too much junk food, and looses it all on a wild ride with his father and brother. He also rides both the ferris wheel and merry-go-round, screaming to stay each time the rides stop.