High schoolers simulate animals in a food chain. In this food chain lesson plan, students are identified as grasshoppers, frogs or hawks. Popcorn is spread across a lawn and high schoolers are given baggies (stomachs) and colored sashes to identify each species. Students try to survive and get enough food without being eaten by predators. Variations occur in the simulation and the results are analyzed to compare the "balance" of the food chain.