Art therapy at Coloring-for-Kids.com: Zentangle Art coloring page – online game by numbers, letters or download and paint with brushes. Coloring trains perseverance, attention to small details, teaches you to bring the work you have started to the end. Are you ready to color? A young talent will definitely like to see how a masterpiece turns out. Creative Commons Attribution-NonCommercial 4.0 License. Author of the work: Persimmons Studio.