Multiple rhombic dodecahedron puzzle

A multiple rhombic dodecahedron puzzle, comprising:

• a plurality of wooden puzzles arranged in a multiple rhombic dodecahedron, wherein the multiple rhombic dodecahedron is formed by connecting a plurality of rhombic dodecahedrons to each other, and each of the wooden puzzles comprises:
• two unit elements connected to each other and being the same as each other, wherein each of the two unit elements has a plurality of surfaces, each of the surfaces has a diamond shape or a triangular shape, and two of the surfaces which in the triangular shape are connected to each other to form a concave shape;
• wherein the surfaces comprise a first surface, a second surface, a third surface, a fourth surface, a fifth surface, a sixth surface and a seventh surface, the first surface, the second surface and the third surface are connected to each other, the fourth surface and the fifth surface are connected to each other to form the concave shape, the fourth surface and the fifth surface are connected to the first surface and the second surface, respectively, the sixth surface is connected to the first surface, the third surface and the fourth surface, and the seventh surface is connected to the second surface, the third surface and the fifth surface.