Interlocking system

A system for interlocking a plurality of items, such system comprising:

• a first item including a first planar base disposed beneath and supporting the first item, the first base having a plurality of edges, each edge having a first upper hook member defining a first upper groove and a first lower hook member defining a first lower groove, the first upper hook member being turned away from the edge and over the first base such that the first upper groove is disposed above the first base and opens in a direction facing away from the edge, and the first lower hook member being turned away from the edge and under the first base such that the first lower groove is disposed beneath the first base and opens in a direction facing away from the edge;
• the first upper hook member and the first lower hook member each being U-shaped with the U being turned ninety degrees, parallel to the first base;
• a second item including a second planar base disposed beneath and supporting the second item, the second base having a plurality of edges, each edge having a second upper hook member defining a second upper groove and a second lower hook member defining a second lower groove, the second upper hook member being turned away from the edge and over the second base such that the second upper groove is disposed above the second base and opens in a direction facing away from the edge, and the second lower hook member being turned away from the edge and under the second base such that the second lower groove is disposed beneath the second base and opens in a direction facing away from the edge;
• the second upper hook member and the second lower hook member each being U-shaped with the U being turned ninety degrees, parallel to the second base;
• a third item including a third planar base disposed beneath and supporting the third item, the third base having a plurality of edges, each edge having a third upper hook member defining a third upper groove and a third lower hook member defining a third lower groove, the third upper hook member being turned away from the edge and over the third base such that the third upper groove is disposed above the third base and opens in a direction facing away from the edge, and the third lower hook member being turned away from the edge and down under the third base such that the third lower groove is disposed beneath the third base and opens in a direction facing away from the edge;
• the third upper hook member and the third lower hook member each being U-shaped with the U being turned ninety degrees, parallel to the third base;
• and
• a first upper hook member being locked into a third lower groove and a second lower hook member being locked into a third upper groove, the second lower hook member and the third upper groove and the first upper hook member and the third lower groove being sized to be forced into one another and to be held in place by the tightness of the fit while still being removable, both the first base and the second base being rectangular and having four edges.