In this simulation game, learners play as predators equipped with genetically different “mouths” (utensils) and hunt for “prey” (assorted beans). Over several “generations” of play, the fittest among the predators and prey dominate the population, modeling the evolutionary process of natural selection. Note: this game works best with a group of 15 or more people. See the Teaching Tips section in the guide for ways to accommodate smaller groups. Includes step-by-step instructions, related standards, an example data set and calculation sheet, an explanation of the science behind the activity, and a suggested activity extension that models what happens when a predator group has low genetic variability.