| 摘要 |
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.
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