My friend and I are taking our three 12-year-old boys (one set of twins) on a road trip that will start in Tucson. They all like to eat, and one is a budding chef. We live in Berkeley, California, so these are sophisticated pre-adolescent gastronomes, not your typical chicken-finger-eating kids. They have opinions about chard vs. kale. Where should we go to explore some of the fun food locations in Tucson?