I play the piano.  Leaning more about it would be great.
The piano invented in Italy by Bartolomeo Cristofori around the year 1700 
Neat.  I didn't know it came from Italy.
The first pianos were fortepianos in the 1700s and they had a quieter sound and smaller dynamic range
Cool.  Seems like there can be a lot of different types of pianos.
Acoustic pianos have protective wooden cases surrounding the soundboards and metal strings.
I love grand pianos.  They look so regal. 
The harder you press a key, the greater the velocity of a key press, the greater the force of the hammer hitting the strings, and the louder the sound.