How to teach sudoku to kids: start with 4x4 picture puzzles

A gentle way to teach sudoku to young children: pictures instead of numbers, a 4x4 grid, one rule at a time, then 6x6 and finally the full 9x9.

Updated 2026-10-22

Sudoku has one rule: every row, every column and every box holds each symbol once. That is simple enough for a young child, as long as the puzzle is small and the symbols are pictures rather than numbers. Start tiny, and grow the grid only when the child wants more.

Before you start

• Use pictures or colours instead of numbers. A young child may not read numbers yet, and numbers make sudoku look like maths. It is not maths: nothing is ever added up.
• Start with a 4x4 grid: four rows, four columns, four boxes of 2x2 squares, and four pictures.
• The first time, pick a puzzle with only a few empty squares. Two to four is plenty.
• Sit next to the child and think out loud.

Teach it in four steps

1. Rows. Run a finger along a row: 'This row needs an apple, a banana, a cherry and a pear. Which one is missing?' Do only rows until that feels easy.
2. Columns. Ask the same question going down.
3. Boxes. Show the small square of four. 'This box needs one of each, too.'
4. Put it together. For an empty square, check its row, its column and its box. The picture that is in none of them goes there.

When a guess is wrong, ask 'Is there another apple in this row?' instead of saying it is wrong. Finding the clash is the skill, and children are proud when they find it themselves.

When to move up

Within one size, add more empty squares before you change sizes. Move up when the child finishes the current puzzles with almost no help, and go back a step after a hard day without making a thing of it.

What makes a good puzzle for children

• Exactly one solution. A badly made puzzle can have two, and a child who places a picture that is valid but 'wrong' learns that the rules do not work.
• Big squares, clear pictures and no timer.
• Short sessions. One or two puzzles at a time keeps it a game rather than homework.

Clever Cove's Sudoku Garden follows this path over 12 levels. It starts with 4x4 fruit sudoku with only four empty squares, moves on to 6x6 fruit grids and then to 9x9 with numbers. Every puzzle is checked to have exactly one solution, every instruction is spoken aloud for children who cannot read yet, and the starting level depends on the age band you choose: 3-5, 6-8 or 9-11. There are no ads, no accounts and no timers that rush, and nothing your child does leaves the device.

Clever Cove: Kids Brain GamesSudoku, math & puzzles. Coming soon to the App Store and Google Play.