The Frog Factory is a professional quality Lean kanban simulation available with all the fixings for free! It looks like a lot of work went into making this excellent game, using origami frog folding to teach Lean basics. The game is clearly outlined in the instructions, detailing how to run 5 rounds of six minutes each. Including discussion, the simulation should take about 2 hours.
There are four stations doing different parts of the folding process. Teams compete against each other trying to run the most efficient factory and make the most money. Unbalanced work flow will contribute to bottlenecks in the process, which can be addressed by each team using different approaches.
As the rounds progress, more complexity is added to the game, including colour mix, training and random events. I like how the instructions break each round out and include discussion points for each section.
The downloadable .zip file contains everything you need to run this game, including an Excel file for the scoring, a timer, the instructions and even a paper die to be used to determine value of the different colours!
Dutch website aboriginemundi.com, but all instructions are in English.