Devise a physical problem that can be tested, have everyone in class pull a ChatGPT answer to it, have them read the answers out loud and vote on which one is right, then apply it to the physical version and see it fail. Show them how tweaking the answer just a bit solves the problem.

years of mental discipline and ability to understand that their teacher is neither a genius nor a moron

Ta-da! Just taught them that without all your years.

I cannot, however, think of a single beneficial way to use this to educate small children

Then you’re not a teacher. Please don’t ever teach small children.