I tried playing Minecraft a couple of times but quickly lost interest. Clearly not the case for millions of others. Wired did a bunch of back-of-the-napkin math on how big Minecraft is and put it in an 8-bit video. Find answers to such burning questions such as the volume of the Minecraft world or the time it would take to explore the entire world in real life.
My niece and nephew play the game and its incarnations all the time. I think they even make YouTube videos of them playing. I still don't get it.