Abstract: A puzzle forming a cube when assembled includes a plurality of hexahedron blocks, each block defining at least one hole therein which passes completely through the block. A plurality of fastening elements of substantially identical dimensions with respect to each other are provided, and the blocks are assembled together in a predetermined manner to form a cube with each of the fastening elements passing through predetermined holes of the blocks.

Abstract: A puzzle having a plurality of bolts, a plurality of nuts and a plurality of blocks. The plurality of bolts includes having each bolt with a first end with a head, and a second end with threads, with each bolt having a size different from another bolt. The plurality of nuts includes having each nut with threads for screwing the nuts onto the bolts. The plurality of blocks includes having each block with a plurality of holes passing therethrough, for passing of the plurality of bolts. In use, the plurality of blocks assembles in a unique pattern with the plurality of bolts passing through the holes of at least two of the blocks holding the blocks together with the nuts.