This is a variant of Chinese Checkers, where the "holes" (that contain the marbles) are hex nuts, a colored set for each player. On your turn, you can either move a nut or a marble. Nuts move either one space (on a board that looks uncannily like a standard Chinese Checkers board) or can jump over intervening nuts. It's pronounced "Canook," by the way (says so right on the box!).