A wonderful set of 50 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. The cards are wipe clean and the pack includes a special pen with which to write the answers on the cards, making the pack entirely self contained and easily portable. The cards are robust and durable, ensuring repeated use.