If it is talking about picture or image, there are many types of genres that people can find in picture more over when it is dealing with art. Realism, cubism, abstract and many others are the samples of the genre in painting or art. This can be valid also for other field of art such as sculpture or others. It depends on the preference of the people.
Abstract coloring pages can be used for people to have fun at the same time spending valuable time. Actually this is not only fun for children because adult also will have the same enjoyment in doing this kind of thing. Since it is abstract, any ages including adult can find aesthetic from the picture and make it better by putting color on it. Abstract will be better to be used for adult than children because they could not find any meaning from it since abstract will have no sure shape or thing in the picture.
There are many coloring pages that people can download in various websites. People can choose which image that they like and create brand new creation by living the color in the picture. Having abstract page people can have fun by escaping reality to the beauty of abstract.