Point out the mold that has grown on the food that you left sitting out. Discuss proper storage of foods. Keep hot foods hot. Keep cold foods cold. Don't leave foods that need to be refrigerated or kept warm sitting out for long periods of time.
Groups write storybooks.
Divide the class into small groups. Have each group make a book to share with a younger child or classroom. Tell students the stories should explain how to store and serve food to keep people healthy. Students plan a picnic. Reflect, summarize and discuss.