Snow Blocks are blocks made from snow. They are crafted with four snowballs, allowing the user to create them through their inventory crafting window. One cannot reverse the crafting process on a crafting grid, but the block may be placed and destroyed with a shovel, yielding the four snowballs it took to create them. If broken without a shovel or a Silk Touch shovel, you will not get the four snowballs back. In the second alternative, you will have the snow block.