The Free Love Circus musicians, Brian and Chris, did sound for me and the four sets I did on the Youth Stage at the Mateel Fest last weekend, and then right after each set, played for their own show. These guys and their act were amazing. Their families are in the show too, and they've toured around the world. Check out their website, freelovecircus.com, and watch for them in your area!
Chris plays a steel-front ukulele---the steel helps amplify the sound--- and he introduced me to A minor on it.