Mammoth, miniature & one-of-a-kind By Melissa Hart Sculptors this season promise whimsy, color, and endless surprises in the form of a giant metal sculpture of a rock topped by a sheet of paper and bisected by red-handled scissors, a 6-foot leopard-print stiletto trimmed in red fur, or a couple of professional tennis players forged from a family’s heirloom silverware. This…