World Puzzle Federation - Hmm What about declaring today to be an International Sudoku 4x4 Day? Solve online

Sudoku for Kids - Play Sudoku Online

Sudoku 4x4 - Hard

Sudoku 4x4 Moderate Japanese Puzzles Number Games 4x4

Sudoku 4x4 PDF

Sudoku 4x4 Printable (Great for Kids!)

Thanksgiving Sudoku 4x4

Sudoku Puzzles for Kids : Mini Sudoku 4x4, 6x6, 8x8, & 9x9 Puzzle Grids -Easy Sudoku Puzzles & Solutions for Kids and Beginners (Activity Books for Babies) (Paperback)

Wisewoodz Junior Sudoku Whizz made from wood 4x4 – Eco-friendly Sudoku Game – wisewoodz

Sudoku Challenge

Printable Sudoku puzzles at beginners level for smaller and bigger kids