LED Embroidery Soft Circuit

This is my very first project in the class of Expressive Interface — Fashion Technology. I created a soft circuit using 2 LEDs, conductive sewing thread and 2 coin cell batteries. I put 2 LEDs in series, and it led me to a technical problem in the middle of making this project. After testing the circuit, I found the coin cell I had was 3V, not enough to power up 2 LEDs in series, so I gave more voltage by adding another battery. Problem solved.