Secret Messages Code Wheel

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Construct a code wheel and use invisible writing to pass message on.


lemon juice, match or blunt skewer, paper and a heat source, card with code wheel printed on. Radios, Mobile Phones, Tin Can phones.


Code Wheel
See file attached "secret message coding activity"


  • codes
  • creative
  • invisible ink
  • messaging
  • mobile phone
  • Phonetic Code
  • radio

Badge Links

  • Communicator - Code
  • Communicator - Message
  • Communicator - Message