PHILADELPHIA (CBS) – Coloring books: They’re not just for kids!

A growing number of adults are turning to the childhood activity to relax.

Adult coloring books are among’s top ten sellers.

With themes that range from nature and animals to classic paintings, the books are being marketed to stressed out adults.

One art therapist says coloring can lift your mood, reduce anxiety and relieve stress.

So, what do YOU think? Weigh in on the CBSPhilly Facebook page.