There are some fun thermoforming techniques that use molds to reshape quick-printing flat designs. I've been meaning to try combining the technique with the method where you print onto tissue paper, cloth, or the like. It would make for a great demonstration for kids as you could print and form a flyable plane in a few minutes.

https://makerworld.com/en/models/3258748-thermoformed-pumpki...

https://www.youtube.com/watch?v=-4X6KYlQ7YQ&t=61s