Build spatial reasoning, problem solving and patterning skills the fun way with this great hands-on game. Everything you need to complete 10 challenging Sudoku puzzles with colorful Unifix Cubes. Simply use the cubes to cover the board so that each row, each column and each 3 x 2 box contains one each of the six colors. Includes 36 genuine Unifix Cubes, 10 full-color game boards and an answer key. Boards increase in difficulty. Hours of fun for ages 7 and up.