 | The Octetra ® is a set of two three-dimensional
puzzles based on a physical phenomenon of the dense spatial package of spheres. |
| The Octetra ® consists of six parts of three
different types. |
|  Each part is a chain of spheres coupled together rigidly and
placed within one plane which is important from the point of view of molding the design. |
| Using some of the parts two different shapes may be
assembled: |
| a tetrahedron 4x4x4 using two parts1 and two parts2 |
| an octahedron 3x3x3 using three parts1 and one part3. |
| Before starting the assembly the suitable parts
should be selected. |
| Both of the Octetra ® puzzles assemble with mutual
parts clutching to form the two firm shapes. |
| Judging by the rectangular shape of most of the
parts, the solutions are far from obvious. |
