Minecraft wiki entry for Island_survival, associated text: If you want to expand the shelter, simply dig down a few blocks and dig out rooms underground. Add ladders to the vertical shaft to get back up and add torches as necessary and as resources permit. Even if it is not needed, it is generally recommended for one to dig underground anyway so as to find cobblestone to make a furnace and to obtain another building material so as to avoid wasting wood. Make a stone pickaxe, sword, axe, shovel, and optionally a hoe, if you are in a position to start farming.