Let’s build a saqiah
A saqiah is a device for drawing water. It is a machine powered by an animal (often a cow) that turns two large pinion wheels, one of which is fitted with buckets to draw water from a cistern or well and then pour it into irrigation channels. The saqiah is presented as a kit to the players who must be able to read a two-dimensional plan in order to reassemble it into a three-dimensional model.