i've never learned how to play the piano, it was invented in 1700
Who invented the piano?
it was invented by.. get this... Bartolomeo Cristofori in Italy
How do the piano keys work? What happens inside the piano after you press them?
so the piano is used by a keyboard, that has a row of keys that act like small levers that cause a small hammer to strike the strings
That's so cool! Are there different types of pianos?
yes so the ones that were first invented actually had a vey quiet and soft sound and smaller range
What genre of music uses the piano the most?
Heavy metal music
Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom. With roots in blues rock, psychedelic rock, and acid rock, the bands that created heavy metal developed a thick, massive sound, characterized by highly amplified distortion, extended guitar solos, emphatic beats, and overall loudness. The genre's lyrics and performance styles are sometimes associated with aggression and machismo.
In 1968, three of the genre's
Piano
The piano is an acoustic, stringed musical instrument invented in Italy by Bartolomeo Cristofori around the year 1700 (the exact year is uncertain), in which the strings are struck by hammers. It is played using a keyboard, which is a row of keys (small levers) that the performer presses down or strikes with the fingers and thumbs of both hands to cause the hammers to strike the strings. 
The word piano is a shortened form of "pianoforte", the Italian term for the early 1700s versions