Body Instrument: hands, feet, voice
Percussion Instrument: drum, box, shaker, triangle, tambourine.
Wind instrument: (Recorder,Tin Whistle,Whistle) or hum ‘hmmm’ into a Kazoo.
Tuned instrument: Keyboard, glockenspiel.
Use just one key at first. Try with more than one key.
Make sure you keep repeating the movement pattern evenly.