We love this video by Mark Rober that turns the scary topic of germs into a fun experiment for kids. It will show your kids how quickly glow-in-the-dark “germs” can spread around a classroom—from hands to desks and phones and faces—and teach them why it’s so important to wash their hands for a minimum of 20 seconds.

Definitely worth watching to the end: not only does he strike an optimistic tone that we all need to hear right now, but you also get to see how kids really feel about their school being closed for weeks!