Many Skyrim mods are there to enhance the game in a realistic manner. Better maps, easier menus, improved visuals, etc. This one doesn't do any of those things. It just turns the game into the most Nordic game of Minecraft you've ever seen.
Sure, all it really does is add some turn characters in Skyrim into Minecraft dudes. Steve, the default Minecraft avatar, is there, as are zombies and creepers to fight. It also adds a few new weapons, like Minecraft's trademark blocky bow, pick and sword.
Oh, and one last thing. There are Minecraft pigs in there. Which you can ride.
Aside from the novelty of it all, it actually looks great in motion. You can grab it at the link below.