In Minecraft, you can place and remove blocks using your bare hands or a designated tool based on the block's type of block.

This is possible to a degree by using in-game commands made available by enabling cheats. However, this command won't necessarily change a biome's blocks, but an area's biome classification.

Using command blocks, a Minecraft user manages to make heads spin, as they show a project they've been working on that's pretty mind-boggling.