Rhombic dodecahedron is a beautiful non platonic polyhedron.
It can be stacked to fill a space much like hexagons fill a plane.
if you have the patience to print a lot of them you can create very interesting geometric constructions
As I am a novice in 3d printing, i found quite challenging to print it and open to suggestions on how to place it and what supports to use.
MakerBot Replicator 2