Using your thumbs and forefingers, flatten one small gumdrop to 1/8-inch thickness, lengthening and widening to form a petal shape. Dredge lightly in granulated sugar to prevent sticking as you work. Repeat procedure for desired number of petals. Place petals on a wire rack, and let stand uncovered for 24 hours. Holding each petal between your thumbs and forefingers, use your thumb to press the lower center portion of the petal inward, cupping the petal. Gently curl the top outer edges of the petal backward.