Sudoku for kids
Print sudoku puzzles sized for the child in front of you: 4×4 grids for a first puzzle, 6×6 as the step up, and classic 9×9 for confident solvers. Choose easy, medium or hard, fit up to six puzzles on one sheet, and download the result as a US Letter or A4 PDF with the solutions.
Pick a grid size and difficulty, preview the puzzles instantly, then download the PDF — no account needed.
Up to 6 puzzles per sheet. Every puzzle has exactly one solution, whatever the difficulty — harder simply means fewer starting numbers.
How it works
- Choose a grid size — 4×4, 6×6 or 9×9 — and a difficulty.
- Set how many puzzles go on the sheet and check them in the live preview.
- Download the PDF with the solutions, or copy a share link that restores these settings.
Using these worksheets in teaching
Sudoku is not arithmetic: the digits are simply distinct symbols, so a child who is still shaky on number facts can solve one perfectly well — colors or shapes would work just as well. What it trains is systematic elimination and the habit of justifying a placement before writing it, which is where it earns its place in a math lesson. Ask for the reason before the digit: "nothing else can go in this row" is the answer you want, and guessing is the habit worth heading off early, because these puzzles never require it. Start on 4×4 until one is finished unaided, then move up a size rather than up a difficulty — the jump from 6×6 to 9×9 is much larger than the jump from easy to medium. When a child is stuck, point at a row, column or box rather than filling in a square: the information they need is always already on the page.
Frequently asked questions
- Which grid size should a child start with?
- 4×4 for a first sudoku: four digits, four boxes and a puzzle that finishes in a couple of minutes, which is short enough to end in success. 6×6 uses 2×3 boxes and is the natural step up, and 9×9 is the standard puzzle. Most children solve 4×4 grids comfortably well before they can hold a 9×9 grid in mind.
- Does every puzzle have exactly one solution?
- Yes. Numbers are removed from a completed grid one at a time, and a removal is kept only if the puzzle still solves exactly one way. No puzzle here can be finished two different ways, and none requires guessing.
- What does the difficulty setting change?
- How many starting numbers are left on the grid: easy leaves the most, hard the fewest. When a grid cannot lose another number without becoming ambiguous, that number stays — so a hard puzzle occasionally keeps a few more givens than the target, and it is still a valid puzzle.
- How many puzzles fit on one page?
- Up to six. Two 9×9 grids print at a comfortable writing size for pencil work; four small 4×4 grids suit a warm-up, a relief lesson or an early-finisher sheet.
- Is there an answer key?
- Yes. Turn it on and the completed grids print on clearly labeled pages at the end of the same PDF, in the same order as the puzzles.
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Last reviewed: July 2026. Worksheet content is generated by deterministic algorithms and covered by automated correctness tests — no AI-generated answers.