Playpen

The Playpens were an experiment Gamemaster B.S. invented during his insanity. He captured individuals and placed them in domes made of tables stacked upon each other. The domes were entirely empty besides a single tuft of grass, a sign, and a mailbox. The sign told the captive to start farming his grass, plucking it and planting new grass. In exchange for plucked grass that could be sent to B.S. with the mailbox, the captive could get anything he desired, into his dome. For starters, this typically meant buying a bed for a few tufts of grass.

The experiment showed that anything, no matter how mundane, could be made into a currenc. At least that was Gamemaster B.S.'s conclusion. The domes did in fact, turn into neat homes, as the captives bought more and more things to their tabley "playpens".

Bubber was the main protagonist of the experiment.