This set has 12 free printable sudoku puzzles for kids plus 2 answer key pages. Six are 4×4 picture sudoku — 3 built from shapes (circle, square, triangle, star) and 3 from animals (cat, dog, fish, bird) — so a child who cannot read numbers yet can still solve them. Three more are 4×4 number sudoku using 1, 2, 3 and 4, and the last 3 are 6×6 number sudoku using 1 to 6 inside 2×3 boxes. Every puzzle has exactly one correct answer. Each page is US Letter, black and white, and downloads as a free PDF with no signup.
How sudoku works on a 4×4 grid
A 4×4 sudoku is a square of 16 smaller squares, split into four 2×2 boxes. The rule is one sentence: every row, every column and every 2×2 box has to contain all four items, and none of them twice. Some squares are already filled in; the child works out what belongs in the empty ones.
On the picture pages the four items are drawings instead of digits, so no reading or counting is involved — it is pure “this one is already in that row, so it cannot go there again” logic. The bottom of every picture page repeats the four pictures in a strip, so a child who forgets what is in play can look down instead of asking.
Start with picture sudoku, then move to numbers
Work through the set in the order it appears in the grid above: pictures first, then 4×4 numbers, then 6×6 numbers. Difficulty inside this set is controlled by how many squares are already filled in, not by trickier rules.
- 4×4 picture, shapes and animals — 9, 8 and 7 of the 16 squares are filled in, which leaves 7, 8 or 9 squares to work out.
- 4×4 numbers 1-4 — same three clue counts (9, 8, 7), same grid, but now the child has to recognise digits.
- 6×6 numbers 1-6 — 20, 18 and 16 of the 36 squares are filled in. The boxes here are 2 rows tall and 3 columns wide, which is the part that surprises a child who has only done 4×4.
What is in this set
Fourteen pages: 12 puzzles and 2 answer keys.
- 3 shape sudoku — circle, square, triangle and star.
- 3 animal sudoku — cat, dog, fish and bird.
- 3 number sudoku, 4×4 — digits 1 to 4.
- 3 number sudoku, 6×6 — digits 1 to 6, boxes 2 rows by 3 columns.
- 2 answer keys — one page for the six picture puzzles, one for the six number puzzles. They are separate downloads so the answers are not sitting on the page while a child is still working.
Every puzzle has exactly one answer
Each of the 12 puzzles was checked by two separate solvers before it went on the page, and both had to report a single solution. That matters more in kids’ sudoku than in adult sudoku: a puzzle with two valid answers looks fine to an adult skimming it, but it lets a child finish with a correct grid that does not match the answer key.
The clues you see printed were removed one at a time from a complete grid, and a square was only left blank when the puzzle still had one and only one solution without it. That is also why the clue counts land on 9, 8 and 7 rather than on a round number.
How to print these
Every page is US Letter (8.5 x 11 in), pure black and white, with the grid inside a 0.5 in margin — so nothing important sits in the zone a home printer clips. Print single-sided at 100% scale (“Actual size”, not “Fit to page”), which keeps the squares big enough for a chunky pencil grip.
I left the empty squares blank rather than shading the given clues grey. Shaded cells eat toner on every copy and go muddy on a low-ink cartridge, and on a 4×4 grid the printed clue is already the only thing in the square.
Frequently asked questions
What age are these sudoku puzzles for?
The picture pages are drawn for a child who can compare four drawings but cannot yet read digits, which is typically preschool and kindergarten. The 4×4 number pages need digit recognition from 1 to 4, and the 6×6 pages need 1 to 6 plus enough patience for 36 squares. Because the set moves in clue counts (9, 8, 7 on the 4×4 pages), you can move a child up one page at a time instead of jumping a whole grid size.
How do you play 4×4 sudoku?
Fill every empty square so that each row, each column and each 2×2 box contains all four items exactly once. Start with a row, column or box that already has three of the four filled in — the missing one can only be the item that is not there yet. Then use that new answer to unlock the next row or box.
Does every puzzle have only one answer?
Yes. All 12 puzzles were generated by removing clues from a complete grid and keeping a square blank only while the puzzle still had a single solution, then re-solved from scratch by a second, independently written solver to confirm the answer matches the printed key.
Which puzzle should a beginner start with?
Start with a picture sudoku that has 9 of 16 squares filled in — the first shape page or the first animal page. It is the shortest puzzle in the set and needs no reading, so the only new thing being learned is the rule itself.
Are these free PDF downloads?
Yes. Every page here downloads as a free PDF, with no email, account or signup step. You can also print straight from the browser with the Print button on each page.
What other printable puzzles are there for kids?
Sudoku is one of several puzzle types that print well in black and white. On VerbNow you will also find dot to dot printables (counting 1 to 20), printable matching games and printable animal bingo cards. For a broader comparison of puzzle formats, see types of puzzles for kids.
Everything above lives in the printable kids activities section, along with the rest of the mazes, word searches and quiet-time pages.