Book excerpt: Sudoku s a big craze even with childrenand this huge collection will keep every puzzle-loving kid busy and happy for days. It features a simply phrased three-page introductionlonger than usualto teach all the basics and get new solvers up to speed. Then, one after another, come the sudokus, which start easy and become progressively harder as kids build their skills and proficiency. There are hundreds of 6 x 6 puzzles, smaller than the standard, plus tons of adult-sized 9 x 9 sudoku, too. Of course, all the answers are included, so if a child runs into some difficulty, he or she can see how each puzzle is solved."