The magician enters the stage and shows a foulard to be empty on both sides. They drape it over their left hand and immediately produce a medium-sized birdcage from the foulard, which can then be shown on both sides again.

The above is just a basic routine that can be performed with this cage, but it can be produced in many different ways! Use it with a production prop like a square circle, or if you are comfortable with body loads and other techniques that require skill, you can produce it in a variety of ways.