This Stunning Assortment Of Geometric Black-And-white Designs Features 31 Full-Page Patterns Of Intricately Interlocked Figures That Lend Themselves To Optical Illusions. After Coloring, Put On The Enclosed Glasses And Watch Them Take On 3-D Life. Pages Are Perforated And Printed On One Side Only For Easy Removal And Display. Specially Designed For Experienced Colorists, Techellations And Other Creative Haven Coloring Books Offer An Escape To A World Of Inspiration And Artistic Fulfillment.