Have a look at it if I spin it around like this. What happens? Well, if you take two of these, join them together and spin it around, there's your octahedron again, a beautiful structure.
Miren si lo giro así. ¿Qué pasa? Bueno, si toman dos de estos, los juntan y los giran, se forma un octaedro otra vez, una estructura hermosa.