This beautiful coloring book - not only for grown-ups -- features more than 50 intricate optical illustions. It is the perfect way to unleash your inner artist and creativity.Perfect for beginning artists Optical Illusions Coloring Book will help you create mind-bending optical illusions to fool your brain and tease your senses. Features:Each Image Is Printed One SidedVarious Levels Of Difficulty and IntricacyGreat Size: 8.5 x 11 inchesGreat for All Skill LevelsVariety of designs and patternsMakes a great gift