This is a tree farm, which can farm all the trees with the height of up to 7, and with the size of 5x5 (basic trees). It uses the slime blocks and therefore only works in the latest snapshot. It is semi-automatic: this means that although the trees grow automatically using bone meal dispensers, you still have to press a button to harvest a tree. But, it is only one button click and I'm sure some of you can figure out a way to make it fully-automatic, maybe even AFK-able?