This probability game is an electronic version of the old TV game show Let's Make a Deal, hosted by Monty Hall. It has a surprising outcome!
http://nlvm.usu.edu/en/nav/frames_asid_117_g_3_t_2.html?open=instruction...

This is a flash-based flipchart that can be used as an introduction to probability. It is based on a casino game, so permission to use it should be sought from the Head of Department or the Principal.