Sawan Presents Hard Sudoku Puzzles-4, This puzzle book will entertain kids for hours. Sudoku is an excellent way for kids to develop their logic skills while having fun, and children as young as 7 or 8 can begin to enjoy them. No maths is needed to complete the puzzles, and no guessing should be necessary either! Scroll down for Sudoku puzzles to print and solve. It will improve memory, enhance the attention span, relieve mental strain and increase problem solving abilities.