Over 100 illustrations of skulls for stress relief. Coloring can help with stress, anxiety, Autism, ADHD and depression. Collect all of Dr. Wheeler's adult and teen coloring book series. Fantastic Animals, Fantastic Skulls, Fantastic Dogs, Fantastic Cats, Fantastic Horses, Fantastic Designs, Fantastic Sea Life and Mandalas and More. For younger children be sure and check out The Adventures of Bumble the Bee in both coloring book and fully color formats. These books make the perfect gifts.