Best 2 Duncan brain games all in one! Perfect for travel, gifts, and backpacks! Includes: Quick Cube Color Shift Duncan Color Shift Puzzle Ball 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. 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? Duncan Quick Cube 3x3 One of the keys to becoming a fast solver is having the right equipment. The Duncan® Quick Cube, features smooth, easy turning design to allow the user to corner cut for superior performance and play. No oil needed! See the difference right out of the package. Ideal for novice to pro!