People in cities all over the world- London to Buenos Aires- have been spotting pianos in the street. They’re available for looking, touching, playing, and even decorating, and it turns out that it’s all actually part of Luke Jerram’s artwork.  Now, he wants people to participate and create music right in the streets of New York, so he has installed over 130 pianos in parks, train stations, bridges, markets, and ferries all over the city.  The majority of these pianos are already world travelers, having been as far around the globe as Sydney.  When the event started, there were only fourteen pianos, and now there are many more, so don’t be surprised when there’s a mysterious waltz coming from around the corner.