First it was the Barbican exhibit of zebra finches playing guitars, and then the antique pistols that mechanical birds come out of and dance around. I don't know why birds used in technology always make me happy, but they do. The latest is better to me than pistols or guitars –
It's called Dollar Note, by Robert Gligorov. Apparently there are two white uprights standing back-to-back, and the perches in the birdcage attached to the top touch random keys on the pianos. When the birds jump from perch to perch, the respective notes are played.
I'd love to see and hear the thing IRL, it's beautiful. (via today and tomorrow.)