Sudoku LunaSudoku Luna

Sudoku for kids

A 9x9 grid is a lot to ask of a small child. These puzzles are the same game on a smaller board: four or six rows instead of nine, big cells, no timer, no mistake limit and nothing to lose. Play here or print a sheet for the kitchen table.

Choose a size

For parents and teachers

Sudoku asks a child to hold a rule in mind and test it against what is on the board — the same thinking that later carries arithmetic. Start with 4x4 and the easiest level; a child who finishes a grid alone will ask for the next one. Move up to 6x6 only when the small board has become boring, and treat a wrong digit as information rather than a mistake: there is no penalty here and nothing runs out.

Questions from parents

What age is sudoku for?
A 4x4 grid works from about five, as soon as a child recognises the digits 1 to 4 and can compare them. The 6x6 grid usually fits from seven. Age matters less than patience — some four-year-olds enjoy it and some eight-year-olds do not.
Do children need to be able to count?
Barely. Sudoku is not arithmetic: nothing is added or subtracted. A child only needs to tell the symbols apart, which is why the same puzzles work with shapes or colours instead of digits.
How do I explain the rules?
One sentence is enough: every row, every column and every small block holds each digit exactly once. Then point at a row with one gap and let the child find the missing digit — the rule explains itself faster than any description.
Is it free and safe?
Yes. No sign-up, no adverts aimed at children, no personal data. Nothing is saved beyond the puzzle in front of you, and the printable sheets need no account either.
What comes after 6x6?
The regular game on the easy level. It is the same rule on nine rows, and a child who finishes 6x6 comfortably will manage it with a little help at first.

Difficulty levels