I'd get new ones that don't look like piano keys if I were you.
When you release the pressure, it will spring back in position again, just like a piano key.
She lightly touched the piano keys but didn't make any sound.
It also makes use of piano keys and guitar strings.
This bellows struck the piano key and so played the note.
"It sounds like one you could hear if you hit a piano key."
I had one of the gang hit a single piano key and the audience jumped.
But it also forced a change in a less obvious area - piano keys.
Meanwhile, the piano keys hit the main characters as the music plays.
Then she started to raise her arms off the piano keys.