Coloring books are where most kids start to develop their artistic dexterity. They are available relatively cheap, they are often related to cartoon characters or objects familiar to very young children. They provide guidelines for children who are learning to control their hand movements by "coloring inside the lines".
Of course, pre-school education is definitely very important, yet in various cases kids simply dislike schooling because it might be monotonous. At the same time use of games features in education absolutely solves that very frequent problem for little ones and their parents.
No matter what the theme or the picture, all a child - or the young at heart - needs is the page and something to color with. Pencils, crayons, markers, watercolor paints, chalk. There are coloring books made specially to be used with water-colors, that come with their own little set of paints and brush, and have thicker pages.