Have the class teach you how to make a peanut butter and jelly sandwich. Follow their instructions, EXACTLY. If they start off with something like “put jelly on the bread,” put the jar of jelly on the loaf of bread. It’s really fun with kids and they learn a lot about logic. Everyone gets to chime in, the adult looks silly and handles mistakes gracefully, the situation can end up hilarious.

I’ve done this with a kid and also in an intro programming class, and it worked with both age groups.