Minecraft wiki entry for Furniture, associated text: Another neat way of making easy and simple desks is to have a set of pistons lined up in patterns in rectangular shapes or lines. Simply place redstone blocks in the shape of your desk one block beneath your floor. Then place pistons atop the blocks for a permanent desk/table. Another way to make a desk is after the pistons are placed, put a single redstone torch under each one of them, causing the pistons to activate, and thus making a quick and simple table. An adaptation of this is to put a piston in the ground facing up and put pressure plates around it. When you walk up to it, the table/desk pops up.