Coloring books for adults is an offspring of art therapy which is a mental health profession that is the process of making and creating artwork which intends to "explore feelings, reconcile emotional conflicts, foster self-awareness, manage behavior and addictions, develop social skills, improve reality orientation, reduce anxiety and increase self-esteem" (according to the American Art Therapy Association). So basically, it's similar to good old therapy. Also, art therapy is not only about mental health and improving yourself - it's a form of personal expression, as well.
Just like reading stories in picture/illustrated books with their children, parents often use coloring pages to teach children and stretch their imagination. Standard coloring pages provide outlines within which children can color, but some art educators believe that free-form pages are an even better tool. A good example of these coloring books can be found at CreativeColoringBooks.
My kids most of all like to color animals. I know it and thats why on our website we have big collection of coloring pages with animals. We have here pets and wild animals, birds and fishes, reptiles, real and fantastic animals. In other words we have here zoo coloring pages. You can easily download or print any coloring pages right here, on our site. Our collection canstantly grows up. We draw animals for colouring almost daily. I hope you and your kids will enjoy our drawings. Also our coloring pages will be suitable for teachers at beginning school and at the kindergarten. What do we wait? Lets pick up colored pencils, take b/w drawings of animals.