hands on demo

If we would do a hands-demo in the future, what should we do for it?

I would like to learn things like how to fix a bike, how to be more energy efficient (i.e. solar energy, though this may be difficult or expensive to do in one session), stretch a canvas, make your own clothes.

Do any of these thoughts resonate with you? Do you or someone you know have these skills? What would you like to share/learn? Any other suggestions?

Ben