What do you know about the piano? Great instrument!
It has been around since 1700.  
Where was it invented, do you know?
It was invented in Italy by Bartolomeo Cristofori.
Interesting! What else can you tell me please? I'm so curious.
The word "piano" means soft, and the piano can be played different volumes by using different pressure on the keys.
What do the black keys do?
I don't really know much about the difference in the keys. Other than you press them down to cause the hammers to strike the strings.
Did Bartolomeo invent anything else?
There were a couple of guys named Bartolomeo, one named Veneto was a painter, but it was a different guy.