ColorKu — Sudoku using colors instead of numbers

Interesting.

I wonder if certain very clever and bright children, long before they're introduced to the concept of numbers, might well find this of immense interest, and even become quite adept at it, confounding the baffled adults in the room.

From the website:

Crazy for Sudoku?

This version uses colors instead of numbers!

Think you’re ready for the challenge?

ColorKu is played like Sudoku, only instead of solving the puzzle by arranging nine different numbers in columns and rows, you solve it using nine different colors!

The object of this game is to arrange the colored balls so you end up with one of each color in every row, in every column and in every 3"x 3" square!

Includes 104 puzzles (plus solutions) from simple to challenging to really tough.

Clue cards help you set up the board.

Play alone or with others.

13" solid wood board with 81 balls.

Not intended for children under the age of 3.

$29.95.