I like playing the piano which was invented in Italy
Awesome!  Who was it that invented it?
Bartolomeo Cristofori was the inventor of the piano.
I've always wondered how many black keys and white keys were on a piano - do you happen to know?
I don't actually know how many keys but they work by having a hammer strike the strings of the piano.
That's interesting!  When was the piano invented?  I bet it was a long time ago!
Around the year 1700 but its hard to know for certain what year the first piano was created.
I've heard of the Grand Piano - are there any other kinds of pianos that you know of?