Wearing a hand-crafted fish-themed jacket, James “Jamie” Freid showed off his rainbow-painted ukulele to a group of about 20 onlookers. They smiled at the Kermit the Frog design he painted on the front and elements he woodburned on the back. This art piece was one of several Freid, 31, shared last week as the public toured Creative Growth, an art center in Oakland that supports artists with developmental disabilities. Freid, who has autism, led the tour as part of Creative…