Great teaching tool

It's Sudoku in colour! Really helps to develop thinking skills and fine motor skills. It's a hit with my 9 year old because it's colourful. It comes with over 100 Sudoku challenge cards from easy to expert (you can buy more separately if you run out). You can also turn any traditional Sudoku into a Colorku puzzle by using the key on the box to transfer numbers to colours. Made of solid wood.

Great quiet games for one that challenges everyone.