In the maker's words
Can you separate the five pieces of the 3D jigsaw and then meld them back together again? At first glance, the pieces do not seem as though they are unlockable. If you do get them apart there’s a whole new problem for you to get them back together again. The most useful hint would be not to apply too much pressure as this could be counterproductive. Once truly conquered, this puzzle makes an intriguing conversation piece and a fun toy to fiddle around with unconsciously. Maybe it could be your new paperweight! Invented by Kenneth Walker of California.
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