Here is an interesting article from the Huffington post about adults who color. The relaxing focus that the article writes about is applicable to drawing Zentangle, Mandalas, and Celtic Knots as well.
Here is a snippet from the article
Coloring has a de-stressing effect because when we focus on a particular activity, we focus on it and not on our worries. But it also “brings out our imagination and takes us back to our childhood, a period in which we most certainly had a lot less stress.”
For me, shading and coloring Zentangle Inspired Art is about more than creating beautiful art. Filling in space with color or pencil is very meditative. Watching a piece bloom with color is so gratifying. The results can be positively magical. Layering colors creates a beautiful depth that is so captivating to watch as it develops.
When my kids were young, they didn’t have coloring books. I didn’t object to them coloring, I just wanted them to draw their own lines. Coloring Zentangle Art, Mandalas and Celtic Knots which YOU draw gets the best of all worlds.