Idea š + š = village
glass + š = greenhouse ( house that made out of glass)
village + village = city
Add metal stone + š„
Add tool = metal +šŖØ
ADD sword= metal +šŖØ or tool + stone
Add wood = tool + ???
Add wheel = wood + ???
Add engine= steam + ???
Add car = engine + ??? or wheel + ???
Add gunpowder