Broadway Toys Hanayama | U&U Hanayama Metal Brainteaser Puzzle Mensa Rated Level 5 75*119*45 mm
- Two U-shaped bolts and four nuts ? this looks like a combination of spare parts but looks are deceiving. This puzzle comes with a deviously hidden trick. The key to unlocking these parts is to look carefully at each part first. It was designed by Kyoo Wong from Hong Kong.
- The theme is complexity.
