The Colorku Story Colorku is the original 'Sudoku in Color' wooden board game. The family started making Colorku in 2005, by drilling holes into old wooden planks and hand-painting hundreds of wooden balls at our cabin near Lake Michigan. Now, ColorKu is played by many as a fun, challenging pastime and has been used as an educational and mental strengthening tool in schools and hospitals around the world. Colorku can be played alone or with others. Use puzzle cards to set up the board and deductive reasoning to fill in the missing spaces. One of each color fits in every column, row, and square. Solutions are included. Features & details: The original color sudoku board game To solve the game - set up the board according to the puzzle card Colorku can be played alone or with others. Ages 8+ Includes 104 puzzle cards and solutions – in 5 different difficulty level (Easy, Moderate, Challenging, Tough, Extreme) with puzzle card holder. 81 small colored wooden balls Colorku can help sharpen your logic and deductive reasoning skills! Check out our store for additional games to play on the same board 11.5" X 11.5" - Weight 3.8 lbs This is an unused item, however I recently noticed it has some cuts and spotting on the exterior box as shown in the last couple pics. The wooden game board and balls seem great condition. Legal Disclaimer : This Item Contains Small Colored Balls And Not Suitable For Children Under 3/Three.