A percussion instrument is something you play by hitting, shaking or banging it.
It can be something like a drum or tambourine, or even a pot or a table that you tap with your hands or sticks to make noise.
When you hit the instrument, it vibrates and makes sound waves that travel through the air to your ears, which is what you hear.
Percussion instruments are used in different types of music, like rock, classical, or even just for fun.
So, if you want to make some noise and get your hands moving, grab a percussion instrument and start playing!