A handy, paperback book perfect for popping into a pocket or school bag, packed with puzzles, games and activities that will put your powers of logic to the test. It is a well-known fact that you can exercise your brain just as you might exercise your body; this book will keep children's grey cells ...

A handy, paperback book perfect for popping into a pocket or school bag, packed with puzzles, games and activities that will put your powers of logic to the test. It is a well-known fact that you can exercise your brain just as you might exercise your body; this book will keep children's grey cells in tip-top condition.