a.k.a. Twisting Tri-Side Puzzle
Patented by Heng-Chun Ku 2000, copyright Playroom Entertainment 2002,
Made by Dah Yang Toy Industrial Co., China.
(plastic, 5 inches)

Turn the knobs to rotate a circle of six triangles. Mix up the puzzle and then restore it to six colored wheels as shown above, or make different patterns such as those shown below. Jaap's Page presents a solution.


Further Reading
Jaap's Page, from: http://www.jaapsch.net/puzzles/madtriad.htm
Ku Patent, from: www.uspto.gov - patent no. 6,022,021