turn plain trash cans into these with sheets of duct tape, use die cut machine to cut circles or whatever pattern you wish and wa-lah! ( love the idea of duct tape sheets and the die cut machine or cricut!
See the Germs! Glitter mixed with hand sanitizer. Teacher uses it, pretends to cough, and then shakes hands with 1 student. The students then shake each others hands and see how the glitter "germs" spread. Discuss proper hand washing after.