A kids activity that has become increasingly popular with adults, is also credited for improving mental wellness.

Dana Oatis with Lourdes Health Network says it is a tool counselors have been using for many years to help reduce stress, overthinking and worrying.

"You don't have to think much when you are doing it, you can just enjoy it," says Oatis.

She says while adult coloring books are more detailed and geared to those over 10-years-old, it is more of the activity itself, that can help reduce stress.

You can find the popular adult color books in nearly every book store. According to Neilsen Bookscan, adult color book sales jumped from 1 million to 12 million in 2015.

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