Interactive Objects is a studio which design tangible technology.
Here is a few projects of them.
It gives a interaction without any languages. A public space sharing concept
Another one is similar with it is corporative music generation. It also brings the public into a corporation in a playful way.
Translating messages into regular behaviour is a great way to redefine some public space. Small Talk is a brilliant project to make a sharing clothes peg talk for you. It achieved a nonliving conversation more interestingly.