Sharpen your students" logical thinking and mental agility with Unifix Sudoku. The instructions couldn"t be simpler: use the clues to cover the board so that each row, each column and each 3 x 2 box contains one each of the six Unifix colors. Use with standard Unifix Cubes or add to our Unifix Sudoku Kit for even more puzzles. Answers included. 24 cards.