When I mentioned that I was going to the airport, my colleague asked me to check out Kinetic Rain. I thought it was going to be one of those touristy water feature that you would expect to find at Changi Airport.
Boy, was I wrong. It is beautiful, awesome & we were mesmerised.
It is apparently the world's largest (it is after all in Singapore) kinetic art installation - computer-controlled aluminum *droplets* 608 of them, moving them up & down fluidly forming beautiful patterns. Created by German ART+COM. Be sure to look for it when you are in Terminal 1.