Check out “Soundie” by Kanjun Qiu. It’s an interactive hoodie that plays music based on touch. It also has some LEDs for visual feedback. The entire piece is based on the LilyPad Arduino.
I’ve looked at a ton of light up garments, El Wire, etc. This is one of the most tastefully- and artfully-done articles of clothing I’ve seen as of late. Instead of hiding the electronics, the graphic on the back integrates, even highlights the main board.
More about Soundie: Interactive hoodie
In the Maker Shed: Make: Arduino