This is one of those things that just pops into your noggin completely out of nowhere.  This is an all-white tetrahedron and then an all-black tetrahedron has patterns cut into it and is then folded around the white tetrahedron.

These were pretty time consuming as I had to lay them out by hand as well as cut them by hand. So many hours and X-Acto blades later...

Now, you could do it on a computer and use a laser cutter and could do it so much quicker and more accurately but you go with what you have at the time.. I made these well before I had a web page and never, ever imagined I'd be showing these in public and snapped a few quick pictures with a cheap camera without any thought as to composition and lighting, so sorry about the lower quality photos.

I gave one of these to a guy I met while in New Zealand for Christmas.  He was younger, twenty-three years old or so, with the typical friends of that age.  He really liked it but his roommates were convinced I had the hots for him saying, "No one makes something like that for someone unless they're trying to get them in bed."  Ah yes, the impeccable logic and mindset of the young.