What happens when you through a block in the air? It falls down. Now what happens when this happens? Wood = "=" = = = = = = = = = = = = = It falls down. Henceforth, blocks affected by gravity. Now, using this same principle, you could have block-made levers and gears that work to make something previously impossible for the player to do on his/her own. Now, you don't put 9 items into a crafting table to make an engine or a furnace. If we could create custom voxel based machinery out of microblocks, now that would set SOA apart from all other games.