







🧠 Unlock your next-level brainpower with the Coil Puzzle — where challenge meets craftsmanship!
The COIL Hanayama Cast Metal Brain Teaser Puzzle is a Mensa-rated Level 3 mechanical puzzle featuring two interlocking geometric metal pieces. Crafted with precision in the USA, it offers a moderately difficult challenge ideal for ages 12 and up. Designed to boost creative thinking and memory, this durable, portable puzzle combines innovative design with premium materials, making it a must-have for serious puzzle lovers seeking a sophisticated mental workout.






| Educational Objective(s) | Color Recognition, Creative Thinking, Memory Skill | 
| Language: | English | 
| Model Number | 30831 | 
| Number of Game Players | Single Player | 
| Number of Puzzle Pieces | 1 | 
| Assembly Required | No | 
| Batteries Required | No | 
| Batteries Included | No | 
| Material Type(s) | Metal | 
| Colour | green | 
| Product Dimensions | 12.07 x 7.62 x 0.25 cm; 136.08 g | 
| Item model number | 30831 | 
| Manufacturer recommended age | 12 years and up | 
| Manufacturer | University Games | 
| Country of Origin | USA | 
| Item Weight | 136 g | 
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