These are some placeholders I modeled for a quick romp.

They include an oven, some bread dough, cooked bread, half a bread, vases, flour. Mix flour with water, get bread dough. Put the bread dough onto the fiery part of the oven, and it grows into a cooked bread.

Also a big box that's supposed to be a smelter, with a door and a handle, and a spot for placing moulds (also included). Put the ore in, close the door/lid, press the handle, and the mould you placed gets filled.

None of these are UV mapped! Just different materials w/ different texture colors set in blender!