Add Yahoo as a preferred source to see more of our stories on Google. Think coloring is for kindergarteners? Think again! Well, it totally is, but it's also for grown-ups in need of stress relief.

When Amanda Rulton picked up a cheap coloring book and some felt-tip pens, she didn’t expect the activity to stick. It came when she was in the middle of a health crisis. Eighteen months ago, she had ...

As of this writing, five of the top 30 titles on Amazon’s best-seller list are adult coloring books. With over 2000 titles out there and rising, the phenomenon of adult coloring-within-the-lines just ...