Add Yahoo as a preferred source to see more of our stories on Google. When most of us get that package in the mail from Amazon or wherever, we tend to throw the cardboard box away. We might keep a few ...

Elliott, left, and Sam Coffey race marbles on their Space Racer Marble Run. Elliot Coffey races marbles on his Space Racer Marble Run. Elliott, left, and Sam Coffey race marbles on their Space Racer ...

Which marble run is best? Marble runs are rolling ball sculptures you build yourself. You assemble tracks in all kinds of wild configurations and watch as the marbles roll down hills, around corners ...

There are few things that can keep a certain kind of mechanically-inclined mind entranced as well as a marble run, and few structures that look as interestingly organic as procedurally-generated ...

This immense working marble run was made entirely out of cardboard boxes, and took its creator two whole months to build. When most of us get that package in the mail from Amazon or wherever, we tend ...