100 Logic Puzzles by Simon Tudhope, Packed with puzzles, games and activities that will put children's logic to the test. This vibrantly illustrated book, has puzzles that include castle code using patterns on different shields, drawing impossible shapes and lots of mind-bending riddles. Answers are included at the back of the book. Perfect for keeping kids busy while traveling or during quiet time. Paperback, 112 pages. Recommended for ages 6 to 9 years old.