Children's Corner , Children's Corner
50 Secret codes
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 contai
- Bone, Emily
- Usborne Publishing Ltd
- 50
- Cards
- 9780746089125
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