Christmas Math Puzzles For Brainy KidsCreative Activities, Fun Puzzles, Brainy Challenges, Coloring Pages.Enjoy this holiday-themed puzzle book, which includes Sudoku, Across-Downs, and Magic Squares. For kids, this is a fun and challenging activity book that will keep them entertained and learning for hours.for book : pages : 161 pagessize : Â (8.5''X''11 inches)