Sudoku for Kids #99
sudoku · ages 5-8 · medium
Editorial team · Published August 16, 2026
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Welcome to Sudoku for Kids #99, a medium-difficulty 6x6 sudoku puzzle designed specifically for ages 5-8. This free printable features a clear 6x6 grid, divided into six distinct 2x3 boxes with bold outlines. Approximately half of the numbers from 1 to 6 are already filled into the grid, offering a satisfying balance of starting points and empty spaces for your child to complete. The goal is to fill every empty square so that each row, each column, and each 2x3 box contains the numbers 1 through 6 exactly once, with no repeats.
For this particular Sudoku, a great strategy is to start by focusing on a single 2x3 box that has the most numbers already filled in. Scan that box for the missing numbers from 1 to 6. For each missing number, check the corresponding rows and columns for any instances of that number. If you find a row or column that already contains that number, you can eliminate that square as a possibility, helping to narrow down where the missing number can go within that box.
Solving Sudoku for Kids #99 helps children practice their logical reasoning and number recognition skills. As they scan rows, columns, and 2x3 boxes, they are actively engaging in problem-solving and critical thinking. The act of writing in the numbers also provides a gentle exercise in fine motor control, encouraging neatness and precision within the grid's squares.
A practical idea for parents and teachers is to laminate this Sudoku page. Your child can then use a dry-erase marker to solve the puzzle repeatedly, allowing them to practice and refine their strategies. This also provides an opportunity to time their progress, encouraging them to try and beat their previous completion time as they become more familiar with the puzzle's logic.
Teacher notes
Skills practiced
- Logical reasoning and elimination
- Number recognition and one-to-one checking
- Persistence with a multi-step problem
- Explaining reasoning aloud: "this must be a 3 because..."
Suggested use in class
- Math warm-up projected on the board, solved together
- Independent center with the answer key face-down for self-checking (pair up students who need support)
Time estimate
10–15 minutes
Materials
- Printed page
- Pencil with eraser
Download & print — it's free
US Letter (8.5×11"). Print at home, no sign-up needed.
Tip: set your printer to “Fit to page” for best results.
Includes answer key (page 2 of the PDF)
Print just page 1 for the puzzle, or both pages to keep the solution handy for checking.
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Frequently asked questions
My child says the puzzle is impossible. Now what?
It isn't — every grid starts from a fully valid solution, so a way through always exists. The trick is to hunt for the most-filled row, column or box and ask what's missing there. If a wrong number went in early, a fresh printed copy is often kinder than untangling the error.
Is this sudoku size right for a beginner?
Smaller grids are the on-ramp: 4×4 boards suit first-timers, 6×6 suits kids who've solved a few and want more of a challenge. This 6×6 is a good step up once the 4×4s feel easy.
Can my child do this one alone?
That's the sweet spot of this age — hand it over and let them own it. Resist hovering: figuring out a sticking point solo (or choosing to ask for help) is a bigger win than a perfectly completed page.
Will it print okay in black and white?
Yes — the printable itself is black line art on a white background, so any printer handles it, including basic laser printers. Set your printer to grayscale or "black ink only" to save color ink; the page will look exactly the same.