(CNN) - Grown-ups appear to be returning to a childhood favorite activity to relax. Adult coloring books are among Amazon's top 10 sellers.
With themes ranging from nature and animals to classic paintings, the titles are being marketed to stressed-out adults, who want to benefit from the quiet zen that a coloring session can bring.
One art therapist, who has published several coloring books, says coloring can lift the mood, reduce anxiety and relieve stress.
As to why more adults are investing in crayons and coloring books for themselves, it may have something to do with easy online access and the desire to unplug.
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