Make Your Own 3D Illusions : Make Your Own 3D Illusions offers deceptive images, visual tricks, and optical puzzles with an exciting extra dimension: the book is completely interactive! More than 50 three-dimensional images designed by Archimedes' Laboratory require readers to manipulate press-out cards to fit shapes inside shapes, create new shapes, and more. The all-important answers - if you need them - are also included, along with explanations of how the illusions fool the brain. Sure to provide endless hours of fun . . . and frustration!