For this idea, there would be a different type of stone named Mining Stone. You would use a Pickaxe to mine the stone. The pickaxe would use 10 cotton every time you use it and your pickaxe's durability would depend on how much cotton you have. Explosive bombs would mine out a larger area, maybe a 3x3 or 5x5 sphere. There would be one type of ore, and it would be a Stuffing Ore. It would give you 1000 stuffing every time you mine one of them.
Reply to this with any other ideas you have for this idea!