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Invisible Ink: Yes & Know® Book 7-77


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The special pen reveals the invisibly printed answers!

Ages: 7+

See how much you know with hundreds of interesting questions on dozens of different topics. Have fun competing with the invisible opponent as you play games by yourself. Check out all 6 books in the Yes & Know® Invisible Ink Book series.
  • One special pen
  • 48 pages of fun games and trivia
  • Book Size: 6" x 11"
Customer Reviews
3.0 Based on 1 Reviews
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Rachel K.
United States United States
Outdated a bit

A bit outdated for young kids. Is fun but not all games are common knowledge or as easy for younger children

  • What age(s) is it most appropriate for? 10 years