Minecraft is a game where you mine and craft. There is a substance called redstone which you can mine, and craft into circuits. Even making simple logic gates is quite finicky. That hasn’t stopped people from trying to make more complicated things like adders.

Somebody has made a scientific calculator with a proper display and a graph plotter.

[youtube url=http://www.youtube.com/watch?v=wgJfVRhotlQ]

I am agog.