In “Currency”, add:

Workers have an amount of Things, which is publicly tracked. Things have a name, defaulting to “Bugged Thing”, and are tracked in the Things column for Workers by having their names listed (eg. “Coffee, Backache, Pink Slip”).

A Worker can pay a Thing called Sugarcube to gain 1 Box with an integer value of their choice between 1 and 7, inclusive.

To the list of Machines, add:

Harvester
- Cost: one Cog
- Effect: For each Hot Greenhouse you own, gain two Things called Sugar.

Greenhouse
- Cost: None
- Effect: None

Sugarcuber
- Cost: one Cog
- Effect: For each Sugar you have, remove that Sugar and gain one Thing called Sugarcube.