You will need:
3V coin cell battery
sewable battery holder
Place the circuit stickers on the large piece of felt pointing the same direction. With one piece of conductive thread, sew through the negative sides (grey) of the stickers together. Connect this thread to the negative side of the battery holder (-).
With a different piece of conductive thread sew the positive sides (red) together. Connect it to the positive side of the battery holder (+).