Shells Coloring Book contains over 30 different pictures of shells to color. Some pictures have many shells of one type, others have a variety of shells to color. Visit our Facebook page "S M Coloring and Shading Books" for examples, ideas, techniques and more. The pages are one-sided to enable you to take a picture out if needed for technique, framing, or a gift and not miss out on coloring the other side or have it bleed through. Depending on your techniques and/or markers, you may want to put a piece of paper under the page you are coloring so it does not bleed on to the next page. Looking for more of a challenge, check out "S M Coloring and Shading Books". The pictures are sketch-like and intentionally printed lighter, so that you can color over the gray.