Flow is a new concept for music interaction designed by David Boyce. David has created a music system concept that you can control using gestures alone. The Flow system consists of a number of soft silicone speakers that respond to shakes and movements. Just pick one up and give it a good shake to to get a party going with music to match. Or if your looking for something a little slower for your mood move the speaker is a move relaxed wave motion to trigger relaxing more calming music.