Abstract: A three-dimensional object and method of use is described, such object appearing inverted when viewed by a single eye of a human subject at a selected angle, the three-dimensional object comprising at least one sheet having at least two selected edges, a contoured edge and a surface on which a two-dimensional pattern is formed, at least two of the selected edges of the sheet being attached to each other at an angle of greater than about 25 degrees such that a composite three-dimensional object having at least three interior surfaces and a contoured edge is formed therefrom. The three-dimensional object can further include indicium extending along a portion or all of intersection and fold lines that result when such objects are formed. The interior surfaces can further include patterns, indicia, features and protruding edges.