Modern Art Therapy: Coloring Page – A Dog is Playing with a Blue Ball is an online game and printable coloring book that never ends. Coloring instills a sense of style, because young artists will choose and combine colors themselves. The movements train the hand for writing, develop fine motor skills. Call the children to draw soon! Young artists will be able to share the results of their creativity with friends or save them on a computer as a keepsake. Creative Commons Attribution-NonCommercial 4.0 License. Author of the work: Persimmons Studio.