Mysterious metallic mirrors, stacks of imported marble boulders and a 3D-printed mud hut appeared in the California desert Saturday, as the biennial outdoor art festival Desert X returned.

An curved arrow pointing right. Sisyphus is a kinetic art coffee table that uses a marble that automatically rolls to draw intricate designs on a layer of sand. The artist behind this ingenious ...

So another idea that we've had is the fact that you could have a huge marble run - like an entire wall of your den could be a marble run. How does that sound? OCEAN:Really amazing. TONY ...