In the town of Zadar in Crotia they have a special musical instrument. It is an organ - that is played by the waves from the sea! Have a look at this link for more information http://en.wikipedia.org/wiki/Sea_organ
Melita has a nice idea on how you can learn about this in class. Read on.
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Can someone draw a picture based on a genuine sound of sea organ? Or write a composition based on impressions given after having heard the sounds of this natural music? Here is a podcast of the sound of the organ