What is Minecraft?
In Minecraft, anything is possible. It's a fabulous world that constantly changes and regenerates.
You can play with friends or on your own, and basically... You can do whatever you want.
You can build a house, or a fortress, or a secret lair.
You can atack your neighbors or set sail into the unknown water.
You can make bridges or destroy islands.
You can farm sheep, if that's what you want.
You can do ANYTHING.
However, if you don't want to pay $26.95 for a computer game, which is completely understandable (but crazy), there IS a free app for iPod (and maybe other Apple devices) that is a very limited version of Minecraft, but still fun.
Not nearly as good as the real thing, but hey, it's still something.
It's at the top of my Christmas list, and I think it should definitely be on yours, too.