Based on activities at a couple websites students get to explore the prisoner's dilemma.
I get a huge kick out of the prisoners dilemma. I even set up a "game" in class were we participated in a live prisoner's dilemma to back up this activity, where the students competed for extra credit, they could cooperate or compete, the results were pretty fun.
Follow me at my store!
You are bound to have something cool to share, sell it on Teachers Pay Teachers!