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Two overlapping wheels. Promotional version for The Museum Company.
The printed information that came with the puzzle, has Douglas A. Engel inventing the puzzle. " .....He holds several patents and has published books and magazine articles. Some of his inventions well-known to math and puzzle aficionados include the "Atomihedron" and his "Engle Curves" - puzzles based on the hexaflexatetrahedron and slipagons, circle and wire twist puzzles, and many others.
Thank you to the following people for their assistance in helping collect the information on this page: Thomas Lohe, Brian Hogan.
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