Beware, the designs herein may boggle your mind and confound your eyes. Does the cube go in or out, is the line straight or curved? You'll have fun deciding while coloring them at the same time. 32 designs.
Beautifully rendered, imaginative new geometrical designs. 46 designs.
Is seeing believing? These optical illusions promise to boggle your mind, trick your eyes, and confound your senses. A host of ingeniously contrived constructions and strange interlocking shapes offer opportunities for imaginative and inventive coloring. Use crayons, watercolors, felt-tip pens, tempera, and other coloring methods, then use the enclosed 3-D glasses to enjoy the stunning effects.