Reunite the Seven Pieces and Something Magical Happens Tang Chi Journey into a timeless realm where the power of the mind makes geometry take on form and substance--experience the mystical power of Tang Chi, the ancient Chinese puzzle that comes to life before your eyes. Master the power inherent in the pure simplicity of these seven classical forms. Follow the way of the shapes to ultimate mastery of the mystical puzzle known as Tang Chi. Tang Chi is a challenge for agile minds of all ages. Play it alone, or play it with your family and friends. Play it at home, or use it at work for an invigorating mental break that's completely caffeine-free. Tang Chi, the ideal challenge for the mind. --from the back of the box