After checking out the trains, I walked around to the back of the museum to find the Bubbles exhibit.

Developed by Wolfgang Munch and Kiyoshi Furukawa at the ZKM Center for Art and Media in Karlsruhe, Germany, and sponsored by the Experimental Media and Performing Arts Center (EMPAC) at Rensselaer Polytechnic Institute (RPI).

You walk in front of projected light beams, you shadow appears on a giant screen where bubbles of various sizes are generated on the top of the screen and move downward towards the bottom. Then computerized bubbles will recognize the shadows and bounce off their outlines, making cool sound effects. By moving your body visitors can play with the bubbles and the sound composition. You can pop a bubble by poking it or crushing it between clapped hands, you can also tap it and send it back up in the air, like a volleyball.