[Yukio Shinoda] is probably master of the LED bubble display. She started out with an idea, back in 1994, of a column of water and an array of solenoids to inject air, making patterns in the bubbles.

[Craig Shultz], a mechatronics grad student at Northwestern University, sent us a video of his group’s project from last winter: a 3D bubble display ... and some small air pumps; all driven ...

A soap bubble is simply a very thin sheet of soapy water, called a soap film, surrounding a volume of air. A force called surface tension pulls the soap film tight, so that it always has the ...