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Invent a Cipher

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Invent a Cipher

Description

Your child invents their own secret code, uses it to write a short message, and then challenges the family to crack it. A puzzle-making game about patterns and logic.

What to prep

  • paper
  • pencil_or_pen
  • key_sheet
Cost: FreeBest time: AnytimeCreates something to keep

Play guide

  1. 1Show your child one simple code idea, such as shifting every letter along by three or swapping each letter for a symbol.
  2. 2Let them invent their own code, writing out the key that maps each normal letter to its secret version.
  3. 3Have them use the key to write a short secret message, checking each letter against the key.
  4. 4Ask them to hand over the coded message, with or without a hint, and challenge the family to crack it.
  5. 5Once someone cracks it or gives up, have your child reveal the key and talk about what made it easy or hard.