I had a chance to help out at a farmer's market over the weekend, and I delighted in watching a group of kids - mostly about 4th grade level - set up their own booths and sell their wares. It was glorious!
Out of nowhere they naturally created their own little economy by purchasing products from each other as they had a little extra profit burning holes in their pockets.
Call-in from Yak Horseman and several mailbag letters covered as well!