This was an art installation that was set up at my city hall. It was created by a collective from France - I believe - called scenocosme. The piece is called Akousmaflore and is described as sensitive and interactive musical performance plants. When users brushed their hands through the foliage it triggered an audio response. The technology explained was...and this is layman's terms...sensors that read the the conductive energy created when your body completed a circuit with components of the plant. Kind of like your body was a plug and the plant was an outlet.