Intelligence toy is an old and traditional Chinese intelligence game and has been popular since ancient times. Hiding very mysterious mathematical and physical principles, it is easy to separate within a short time, while difficult to reassemble
Try to get out the ball,and put it in,it not very simple!
Durable and reliable safe non-toxic
Material: natural high quality wood
Size: Approximately 3 3/4" x 2 1/4"
Includes Carry Bag