This is another game that I have had great fun playing and also thought me an my clients a great deal. I use it as staple for all my intros to Lean and agile.
The goal of the game is to move 20 coins through a series of process step (aka players). Each player flips the coins once before it can be passed over.
The game shows very effectively how limiting the work in process (WIP) increases the throughput and improves lead times, both for the first coin and the total time for all 20 coins.
If you move through the game slides quickly a nice little animation effect takes place. Watching that actually gave me a new understanding of what Flow means. Compare the first and last iterations and see the coins flow through the process, each step creating value.
If you like this presentation you will find more like this in Kanban In Action (http://bit.ly/theKanbanBook) where we have dedicated a whole chapter on agile games.