Secret Codes

Secret Codes

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Explains what codes are, details some of the famous codes in history--including the Morse, Window and Invisible Ink Codes--and shows how children can invent their own codesshow more

Product details

  • 6-8
  • Hardback | 32 pages
  • Scholastic Library Pub
  • Franklin Watts
  • English
  • 0531041468
  • 9780531041468