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  1. Easy Ciphers - most popular ciphers: caesar cipher, atbash, …

  2. 15 Interesting Ciphers And Secret Codes For Kids To Learn - MomJunction

  3. Easy Ciphers Tools:

  4. CRYPTOLOGY GAME - SPSD

  5. Simple Ciphers - Crypto-IT

  6. Easy Ciphers Tools:

  7. Ciphers and Codes - Rumkin.com

  8. How to Create Secret Codes and Ciphers: 15 Fun Ideas - wikiHow

  9. Basic Ciphers - Cyber Guide

  10. Simple Ciphers | CodePath Cliffnotes