1. Watch the instructional video and teach the rhythm to the class slowly.
2. Have someone play the melody of the first 8 bars of the song while the kids play the ostinato. (simple melody is notated at the end of this page.)
(Have a part of the class add a chant of "osti - na - to" or counting to three, or conducting a 3 beat pattern to keep the pulse. Define the difference between pulse and this rhythmic ostinato.
3. Have the class try to do the ostinato while listening to the recording.
4. Competition? Put the class in a circle and keep repeating the ostinato. Kids drop out as they "mess up" the pattern. Last one still doing it wins.