A brand new set of activity cards to unleash the inner code-breaker in all of us! A wonderful set of wipe-clean activity cards for aspiring code-breakers! Includes Semaphore and Morse code, "Grid code" used in the American Civil War, Egyptian hieroglyphics and traditional number replacement and alphabet switching codes. Each card contains information about the code, an explanation of how it works and fun coding activities. Includes a special pen to write on the cards.