In collaboration with Market Science (https://marketsci.org/), we went to the state fair to teach kids from all over about how fun chemistry can be! I don't know who had more fun: the kids, the adults, or us volunteers! Overall, we taught over 400 people about ocean acidification, precipitation reactions, catalysis, and how to make slime!To learn more about STEM Day at the state fair, visit http://www.mnstatefair.org/entertainment/special_days_events.html or https://www.facebook.com/MNSTEMDay/