Code-cracking skills can be put to the test in this entertaining book which teaches children how to write and decode secret messages. Includes Sema...
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A handy, paperback book, packed with puzzles, games and activities that will put children’s powers of logic to the test. The puzzles include breaki...
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A pocket-sized book packed full of fun, mind-bending puzzles and games. Children can put their brain power to the test by figuring out a pattern pu...
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