Codes

Create your own cipher wheel to write secret messages. Don’t forget your key so that your fellow agent can crack it later!

Try cracking this mathematical symbol and number based code. This activity includes helpful tips and tricks the reveal the secret message.

In addition to practicing your cipher wheel and pigpen cipher skills, learn about a secret code used by Navajo Code-Talkers during World War II.

A SPY Educator shares fun and engaging out-of-the-box code activities to do at home! Complete a code cracking activity by following along with this video.

Discover the incredible story of Elizebeth Friedman, who revolutionized American cryptology and played a crucial role in bringing down spy rings and mobsters in the 20th century.

Germany built this rare Enigma for its ally, Japan during World War II. Take note of the fourth rotor. Unaware Britain had cracked Enigma, Germany added a rotor in 1942 to strengthen it.

Looking for a new way to hide a secret message? Try this trick using thermochromic paint! When the paint is heated to a specific temperature, it turns colorless and the secret message is revealed! When the temperature falls below that threshold, the paint color returns and the message is hidden again.