Pentagons have 5 sides. A dozen (regular) pentagons make a (regular) Dodecahedron - one of the 5 Platonic Solids.
... surely you always wanted to know that?!
25 challenge - next week = Effervescence
Oops - the thingy I had here died ... (the one below still seems to work though, but I don't think either of them have actually made me any money yet ...)... this one probably works ... I wonder if anyone will click on it? does anyone click on the adds? (I guess someone does or they wouldn't still be a thing - lol)