Illinois Mathematics and Science Academy (IMSA) offers several hands-on distance learning classes. This class is part of the Saturday STEM series - 90 minute explorations to start your weekend out right! For program descriptions, schedule, or to register Visit

What do pirates and spies have in common? They both have something to hide, whether “X” marks the spot on a treasure map or a top secret message needs to be protected. How can they keep this information hidden until they are ready to reveal it? Invisible ink! Come join us to learn the special ingredients needed to create secret messages, and practice writing some of your own. Materials needed for this activity.

Grades 3-4. Fee: $20, registration required. Some scholarships available.