This was the number one I played with my cousin Enzo during every school holiday in Erps-Kwerps. We built a small city on a table in his room; we played there for days. We barely had time to eat, let alone do something else. Sometimes our parents had to force us to play outside. In this play, we also found out about economics (dealing with scarce goods). There was a lack of roof tiles and red bricks to build two houses. As we were two, we had to negotiate and we agreed that one of us could build a house with nice tiles but an ugly blue stone (me) and the other one (Enzo) built his house with the nicer red stones but using regular yellow stones to make a roof.