Beekeeping and making honey is a good project for older boys (and girls). Selling your honey could be a good money making project from home. If you don’t want to keep bees your son could build the hives to sell.
HERE is a good site that several free patterns.
THIS is a really good site, even has coloring pages for the younger ones.
One more good site!
The Barefoot Beekeeper great pictures!
Check out your local Cooperative Extension for the best advice for your area.