Sudoku Fun4Kids makes Sudoku accessible to young children with simple 4×4 and 6×6 boards, three play modes using emojis, numbers or letters, large touch-friendly controls, and hints when needed. It works fully offline and contains no ads, no tracking, no data collection, no in-app purchases, and no account requirement. Available on Android, iPhone/iPad and Windows, it is also marked “Teacher Approved” on Google Play.