Mehndi Patterns Coloring Book - Coloring Book For Grown UpsPaperback, 4 March 2016

Turn your idle time into productivity opportunities. Coloring, though it's a relaxation strategy, actually boosts your brain power. It activates both hemispheres of the brain so logic and creativity are encouraged at the same time. So if you think you have nothing else to do, grab a coloring book and color!