LilyPad Arduino

Lilypad is a small arduino meant for wearable computing. It takes 3.3 -5.5 V external power (no more!) and can be soldered or connected with conductive thread that we have. Make sure distance between the power source and lilypad is not too long, you’ll lose volts because the thread has some resistance in it.

Lilypad

http://arduino.cc/en/Main/ArduinoBoardLilyPad

http://arduino.cc/en/Guide/ArduinoLilyPad

Nice tutorial to get started:
http://web.media.mit.edu/~leah/LilyPad/