If you’re a fan of Sudoku, you and your family will love this colorful alternative. Instead of using numbers to solve the puzzles, Colorku uses brightly colored wooden balls. The gameboard-crafted of solid wood-includes 81 balls in 9 different colors, 104 puzzle cards, solutions booklet, color conversion card and storage tray. There are 5 levels of difficulty. Place it on the coffee table and you’re ready whenever you feel like a challenge.