This is an infinite spiral which I chiseled out from a piece of teak wood. If you run your finger in the semicircular cavity, you would return to the same place after covering each of the six faces of the cuboid block. Besides this, it smells awesome.
MATERIALS AND TOOLS REQUIRED:
Sit back and admire your handiwork. You could also smell your piece because the resin in the teak makes it smell really good.
JUST FOR FUN:
Replicate the texture of wood on an OHP sheet using acrylic paints just for fun and experimentation.