Now we need to grab those headphones and take them apart. You should have one speaker attached to a cord that you can plug into an iPod or a stereo. Plug it in and start playing music to make sure it all works. We want to be able to glue the little circular mirror on the speaker itself.
Grab your glue gun, dab a bit of glue on the back of the mirror, and quickly and carefully place it right in the middle of the speaker, ensuring it remains flat.