Snares are metal wires on the bottom.
or KETTLE DRUMS
Timpani are drums tuned to specific pitches.
1 person usually plays 4 timpani.
There is a foot pedal to change the pitch.
The piano has 88 keys.
When you press a key, a felt-covered wooden hammer HITS a string...because it hits to make a sound, it is in the percussion family.
You can either crash 2 cymbals together, or play them with sticks or brushes when they are suspended on a stand.