After 4 months and a 1/2 bucket of blown out Spheres, my quest to make a chinese Puzzle ball has ended......Success at last. The Chinese Ball pictured is made entirely from one solid sphere. There are 4 balls in all with 3 being in the inside and able to rotate. Sanding minor marks off the inside balls is not a whole lot of fun. The Sphere itself is 2 5/8" in diameter and obviously the inside balls get progressively smaller.