Check out this floating foam letter machine that was shown off at last year’s IFA show in Berlin, the German equivalent of CES. The contraption is called Flogos, and comes from a company named ...

the researchers generated intricate patterns across the water’s surface—such as loops and vortices—allowing them to control the movement of floating objects like foam balls and ping pong balls.

Laboratory experiments showed that these patterns can pull in nearby floating objects, like small foam balls the size of rice grains, and trap them within the patterns. Some patterns act like ...