My idea is adding LED lights and a embroidered fabric speaker which I saw on the example links on legging. I think it is interesting that having your own speaking on the pants so that you can dance when ever you want, and with LED lights make the legging more visually compelling. I plan to use the sound sensor to activate the lights, so the LEDs can light up the sound which comes out from the speaker. The speaker will connect to the Arduino board or lilypad, and the Arduino board will link to a music player.

Embroidered Fabric Speaker

Yu Wei