Ages 6+. Great for the beginner solver! The original. World's No. 1. Challenge your mental skills while having loads of fun! Duncan's Color Shift Puzzle ball can be solved by matching all of the colored balls with their corresponding colored rings. There are 12 holes with only 11 filled with a colored ball. To start, re-arrange all colors by pressing a ball down and shift it to a nearby hole. Utilize the empty hole to maneuver balls around to find their matching hole. Once all balls match, the puzzle is solved! How fast can you do it? CE listed. www.duncantoys.com. Made in China.