Their latest project, Geode, is a line of jigsaw puzzles modeled after agate stone. Like the rest of Nervous System’s puzzle inventory, it has an unusual and dynamic design; it's meant to mimic ...

To up your puzzle collection and challenge your brain, we’ve rounded up some of our favorite jigsaw puzzles that are ... too. Each geode has funky shaped pieces, and since they are made of ...

So whether you’re hunkering down on a jigsaw by yourself or getting to ... design is “fiendishly difficult.” Each of these geode puzzles (available in pink, blue or multi-colored) has ...