Not a box, rather a set of Russian doll…

To open a box, you first need to know it’s actually a box, and then you can shake it open, as often as you want. But you’re right, it’s not a box, it’s rather an infinite set of Russian doll. And so what? Is that a good enough excuse to stop opening them? What about an amazing reason to play the detective card, always impatient and on the move to spot out the edge of the next border…