Little Bits - Bubble Flutes

As part of our Little Bits rotations some of the Dahls have had the opportunity to experiment with designing, making, testing and appraising different electronic circuits. We used power, sound trigger and fan bits to create a circuit, which we attached to a plastic cup with some tape, these became our Bubble Flute creations. We had to use a special screwdriver to test and adjust the sensitivity of the sound trigger and then we dipped the end of our cups into some bubble solution. As we blew and made different noises into the sound trigger it activated the fan and we were able to watch bubbles come out! We had so much fun! 

What other sounds do you think would create great bubbles? Why do you think the sound would make bigger or better bubbles?