Music can be expressed even without a musical instrument.
I once had the opportunity to get on stage with Bobby McFerrin just before he won a Grammy for the song Don't Worry Be Happy. Seeing how he didn't have to carry any gear around except for a microphone it's no wonder he was so happy. It was fun to perform with him.
Beat box artists are the new generation of artists making music without any other instrument but their voice, a microphone, and a few effects.
Don't let their lack of an instrument fool you, they are creating music. Music creation is something that grows inside of you and has to be expressed one way or another as you can see from this beat box artist performing at a TED Talk.
The Orchestra In My Mouth - Tom Thum
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