Spiral Metal Brain teaser consist of five very similar looking metal pieces. The pieces join together similar to those of a jigsaw puzzle. Alas, but not quite so simply. Small, compact, hand-size, tricky puzzle. The objective is to separate the five pieces and then re-join back together in the shape of a disc. NO FORCE ever needed. Clever puzzle and moderately tricky. Hanayama rates this as a level 5 on a scale of 1 to 6 (where 6 is those most difficult.) Your experience may differ substantially. Ratings are subjective. The dice face on the packaging indicates level of challenge. Most puzzlers do find the SPIRAL to be a very satisfying challenge. Great for fidgety hands. Great for ages 12 to 105 years. Some very bright 9-11 year olds may also enjoy. There are 45 plus different cast metal brainteasers in the Hanayama series. Hanayama is the Japanese manufacturer of these puzzles.
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