Potter's Wheel

The Potter’s Wheel turns Clay into Clay Plates, 2 Clay for 3 plates, at Building mastery 2. It comes with Pottery I (10 red, 5 green), costs 2 Wooden Planks and 1 Piece of stone, and stands in your yard.

In the demo it has one job but two reasons to build it: the 6 plates the twins ask for in Two Peas in a Pod, and later 2 plates for every batch of Melted Fat. Pottery I is also the technology before Brick Making, so you need it for the Kiln either way.