I used to attend the plays back when I lived in the U.S. I remember one play where the program listed a bunch of girls who had worked on props. I was really surprised, since there were hardly any props in the play.
I wondered why they didn’t credit anybody with sets. The sets were very, very nice. I finally realized they didn’t know the difference between sets and props.
Perhaps one purpose the play can be to teach the girls about the theater. They can learn stage technique, theater terminology, etc.