Today I combined Jimmie Rogers’ Open Heart kit with a LilyPad Arduino board to make a light-up, animating LED heart brooch. I used conductive thread to attach the two together like a sandwich, and put a safety pin on the power supply. I dangled the brooch from the power supply with embroidery floss and the power/ground wires. The programming pins are still easily accessible for changing the animations. Oh, I also made an instructable for putting together your own.
Open Heart brooch