Minecraft wiki entry for Shelters, associated text: You need 22 stone and a bucket of water. Make a 5×5 square with the nine in the middle taken out so the water won't spill, then make a 4 block high pillar in the middle and place the water on top of the highest block. Taking out the stone pillar in the middle of the fountain can look nice, and placing half-blocks around the stone blocks can look fairly cool. You can also make the fountain a source of light by replacing the stone pillar with glowstone. After making a fountain like this, you could experiment with making fountains in other ways.