Platonic solids
Oktahedron – (Eight field-Solid)

An eight field-solid (Octahedron) consisting of a kaleidocycle with 16 pieces (this is a turning
inside-out ‘solid’ of tetrahedra) and 4 bolts,
which surrounds a stellated tetrahedron (Stella Octangula). It can be transformed into various forms in space and last but not least, you can put it together into a real octahedron.