Participants experience the famous Monty Hall Problem, one of the most surprising puzzles in probability. Using Bertie Bott’s Every Flavor Beans (which include gross flavors like booger and dirt for the zonk prizes), players choose between three jelly beans and then decide whether to stay with their original choice or switch after a bad bean is revealed. Through gameplay and discussion, students discover the surprising result. Included 24×36 Math Festival posterFacilitator script and instruc