Well, as you may know, beauty is the conception of one's ideas about something or idea that give someone a certain emotion about said thing. Really, I would say that beauty is perceived by something if it fits our style or way of thinking/believing/doing/ect. The more something fits to your style, the more you see it as beautiful.
I think Costuming is an art because you put the Costume together, with your own ideas, like when you paint, you put in your ideas into the painting and make it your own. I think it is the same way with Costuming.
Answer: the story of Oklahoma when told used props, the items you listed are took place in story telling