Art therapy at Coloring-for-Kids.com: German Letter Z coloring pages – ZUG – online game and coloring book for free download of drawings for printing and subsequent coloring on paper. 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. Share the work of a young artist with family and close friends or keep it as a keepsake. Creative Commons Attribution-NonCommercial 4.0 License. Author of the work: Persimmons Studio.