Nano Puzzles There is a whole series of Nano puzzles, which are models of various buildings, machines and so on. Nano puzzles are cut into metal with lasers. You punch out the pieces and assemble them. They don't require any soldering or adhesive to assemble. Instead, they are held together by little tabs that you bend over. A needle-nose pliers and/or a tweezers is required to help grip and bend over the tabs.
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