piano is an acoustic, stringed musical instrument invented in Italy by Bartolomeo Cristofori around the year 1700 
Wow, so the piano has been around for hundreds of years.
Yes,   It is played using a keyboard, which is a row of keys 
There have been some famous piano players from Mozart to Elton John nowadays.
of the instrument, which in turn derives from "gravicembalo col piano e forte" and "fortepiano". The Italian musical terms "piano" and "forte" indicate "soft" and "loud" respectively, in this context referring to the variations in volume (i.e., loudness) produced in response to a pianist's touch or pressure on the keys: the greater the velocity of a key press, the greater the force of the hammer hitting the strings, and the louder the sound of the note produced and
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