Re: Other than drums ....
The piano is not usually thought of as a percussion instrument because it never seems to be in the back in the percussion section. But it is indeed percussion since as I stated before it has hammers that hit the strings, not pluck them. Think of the hammers as drum sticks hitting strings. A series of fulcrums and levers connect the keys to the hammers. Just as you have fulcrum in your joints moving the body parts and the sticks.
Follower of the Famularo Philosophy.