Discover the joys of sudoku with this jam-packed book of kids' puzzles. Ranging from easy to advanced with varying grid sizes, this cool illustrated collection builds problem-solving skills and is guaranteed to provide hours of fun for puzzle whizzes aged 7+. ABOUT THE SERIES: Brain Twisters are perfect for young readers who want to put their puzzle-solving skills to the test. With logic puzzles, word games and riddles to crack, this series is perfect for kids aged 7+.