How do I explain sudoku to a child?

Every row, every column and every box must have each picture (or number) once. Find a row with only one gap first: there is only one picture it can be.

Which size should I start with?

Picture sudoku for Kinder and Grade 1, numbers 4×4 next, then 6×6, and 9×9 for confident older children.

Does every puzzle have one answer?

Yes. Each puzzle is checked by a solver as it is made, so there is always exactly one solution and children can reason their way to it.

Are answer keys included?

Yes, at the end of the PDF, with the missing pictures or numbers in red.

Sudoku for Kids: Picture Sudoku and 4×4, 6×6 and 9×9 Puzzles

Logic, not guessing

Sudoku has no arithmetic in it: it is pure reasoning. Children learn to look for the place with the fewest possibilities and to check every row, column and box, which is the same careful thinking good mathematicians use.

Picture sudoku first

Four pictures in a 4×4 grid is a gentle start for children who can’t yet hold numbers in their heads. They can draw the pictures or cut and glue them in.

MATATAG links

KinderCognitive development: sorting and classifying objects by what children can see, including colour and shape.

Sudoku is not in any DepEd guide and has no arithmetic in it. It is reasoning practice: noticing what is missing and checking every row and column.

Picture sudoku asks the same sorting and matching that Kinder children already do with colours and shapes. The 4×4 number puzzles suit Grade 1 and 2 early finishers, and 9×9 is a challenge for upper grades.

Summarised in our own words from DepEd’s MATATAG Kindergarten Curriculum Guide (2023).