This is a bit of an open ended question.
Every year or so, one of the youth groups associated with local churches will want me to come and do some evening youth activity with them about aviation/engineering. The easy solution is to just lecture aviation things at them, but I find that's not very rewarding for me or them. The recent request is to spend some time, 90 minutes-ish, on a weekday evening, with young men, age 15-18, 8+/-4 youth. It's too many (and too cold) right now, to do much out at the local airport I think. We could go look at the plane I fly, but.. meh. There's only so much I can do with paper airplanes and aerodynamics.
I'm soliciting a format suggestion for what to do that would be entertaining/engaging/educational. I could possibly break whatever I did up into 2 different evenings if it were a longer format.
(feel free to slap some better tags if there are any on this)