Art therapy at Coloring-for-Kids.com: Cartoon Cactus coloring page – coloring book printable or online game starts here. 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. 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.