Teaching students the importance of hand washing is fun and easy with the Bag of Germs. Each bag comes with a special replaceable pouch containing approximately 4 oz. of Germ Powder™. This pouch is inserted into a uniquely designed outer bag that, when handled, deposits fluorescent powder on the user’s hands. A UV light is used after washing to reveal any remaining germs. Perfect for use with younger students, as it helps to eliminate waste and messy cleanups. Set includes Bag of Germs (10-1/4 in. x 7 in.), UV light, teacher’s notes, and nylon carrying case.