A substantially hidden element puzzle capable of being incorporated in a
variety of structures such as gift or product containers and greeting
cards includes at least one substantially flat surface having an image
thereon. The image includes at least one elongated element that is only
legible when the substantially flat surface is positioned at a selected
distance and angle relative to the user. The hidden element puzzle may
also include superimposed elongated elements on one or more flat surfaces
of the structure for which it is incorporated.