Theremin
The most amazing feature of the electronic instrument is that it is played without physical contact, and was the first one to be so.

Singing Ringing Tree
Singing Ringing Tree is actually a sculpture located in Pennine Hills, England. It was designed by architects Mike Tonkin and Anna Liu and was installed in 2006. Having a height of 3 meters, the sculpture is made of galvanized steel pipes of various lengths which have several holes.
