How to make working headphones out of cardboard

This is not a dummy, but working headphones, but they are made of cardboard! As a basis for crafts, you can take old or broken headphones and work hard on them. All device functionality is saved, everything you need is configured and rotated.

To make such headphones is easy on your own, you need cardboard, hot melt adhesive and an old donor. Also, such a thing can serve as an accessory for the interior in the design of your workplace.