Inside the piano there are strings of different lengths. When you press
a key, a hammer covered with felt hits the string to make it play a note.
The strings are hidden inside its body. When you press a key a hammer.
Strikes a string inside the piano. Each key plays a different note.
The characterizes of piano
Piano is a popular keyboard instrument.
The first piano was made more than 300 years ago Now, pianos
are almost everywhere.
The upright piano is a popular piano and it take less space than
some other piano
