Art therapy at Coloring-for-Kids.com: Coloring page Onion for Kids is an online game and printable coloring book that starts over and over again. The presented picture can be printed for free for further coloring using paints and colored pencils. 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.