4x4 sudoku is the gentlest way to learn the rules: four rows, four columns and four boxes, each holding 1 to 4 once. Kids solve with numbers, with a circle, square, triangle and star, or with crayon colors. Sets start with the easiest puzzles, two per page, and end with an answer key. The number set also comes in color.

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Free for home, classroom and work use. License information