I think that Prairie Dawn started out as just a generic little girl without very much personality, much like Betty Lou and Farley. I wonder when she began to be more like a very intelligent, adult-like child? And was she this way when she began directing pageants?
In The Muppet Alphabet Album, she appeared in scenes between some of the songs, and her lines easily could have been given to other characters. On that album, she appeared in the What's My Letter? sketch, and then there were two other songs/ sketches featuring generic little girls who were also performed by Fran Brill. They were both credited as "A little girl", but the voices and personalities are both similar to Prairie Dawn's personality, at least her modern personality. I wonder why she wasn't just used in those sketches.