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.

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Coloring isn’t just for kids anymore — it’s now a genuine pastime for adults, too. If you’d like to unwind with one of your favorite childhood hobbies, try a coloring book made just for grown-ups.

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 ...