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Whether made of cardboard or sculpted out of wood, jigsaw puzzles test skills like spatial reasoning and can help to stave off anxiety. They can also be works of art in their own right. By Alexis ...

BOULDER, Colo. — Walking into the factory of Liberty Puzzles in Boulder is like a buffet for the senses. Smells of freshly cut wood waft among the dozens of people operating machines, cleaning, ...