"Full Steam Ahead"

This is not an April Fools Joke.
This is an 'organ' played by blowing steam through the 'pipes' instead of air. (In actual fact, they are not organs and the sound is produced by steam whistles rather than pipes). They are known as Calliopes, You need to turn the volume down a bit before playing, as this is more an example of "Quantity rather than Quality".
Unusual don't you think?