MoPoS is a computer game that allows you to take control of monetary policy in a virtual economy. Effectively, you interact with a stochastic simulation of a macromodel which is simple enough to be easily implemented, but complicated enough to keep you wondering about the behavior of the economy.
The link above contains the game itself (an Excel worksheet with VBA), as well as extensive documentation. For users who would rather not read the whole manual, or for teachers who wish to present the game to their audience, there is also a short tutorium.
