Mostly discussion, this lesson explores the importance and methods of hand washing. A few true stories of community illnesses spread by the neglect of washing hands serve as an anticipatory set. The activity is most memorable if you are willing to purchase the Glo Germ™ oil and use a UV light, but the observation of cinammon and oil on the hands before and after washing is quite visual as well. This important lesson would be poignant and effective with upper elementary schoolers.