Patent ID: 8657288

Claim:
A puzzle assembly comprising: A plurality of puzzle pieces each have an exterior surface, an opposing surface opposite the exterior surface, and at least two adjacent puzzle pieces each having at least one tab or at least one recess, in which at least one of the recesses receives one of the tabs, wherein some of the tabs have a first lip disposed along the opposing surface and at a first edge, a second lip disposed along the exterior surface and at a second edge opposite the first edge, some of the recesses have a first ledge disposed along the exterior surface and at a third edge, a second ledge disposed along the opposing surface and at a forth edge opposite the third edge, and the recess of at least one puzzle piece receives the tab of the adjacent puzzle piece such that the first ledge contacts the first lip and the second ledge contacts the second lip to inhibit displacement normal to the exterior surface of the adjacent puzzle pieces.