"The Mandalas" is a creative adult coloring book designed by Ray Tucker, award winning artist. Explore the relaxing process of coloring with colored pencils. These mandalas are created with a heavier line rather than the usual lighter line. The effect is that of a stained glass window. They are easy to fill in quickly. This is perfect for the person who is limited with patience. It's been shown that coloring by adults can lower ones blood pressure and help to reduce the affects of daily stress.