Art therapy at Coloring-for-Kids.com: Coloring Page – A Dog is Playing with a Ball is an online game and printable coloring book that never ends. Choose a coloring mode, from standard coloring using a wide range of tools, to a game by numbers that children will enjoy and improve attention. A young artist will be able to create a personal collection of finished works and share the beauty with friends! Creative Commons Attribution-NonCommercial 4.0 License. Author of the work: Persimmons Studio.