Step 6: Now the collar
The idea is to make a sleeve for the collar, so leave enough material to wrap around. Set the collar aside.
Cut the cloth and layout your keys and power supply. Leave space between the keys so the collar can flex.
Mark on the back of the cloth where the LEDs will poke through and cut a small X .
Poke the LEDs through the top of the cloth and glue into place.
Hot glue burns!