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Nesting

Boxes fit in boxes and rings fit inside rings.
In this world no end exists to these nesting things.
Other things just roll around looking for their place.
They fall out of one thing into another space.
There is some serendipity to when they finally fit,
but all of these repeating shapes will find a place to sit.
And though the more astute among us may find places faster,
those who roll around a bit may find a world much vaster.

The daily prompts today are repeating shapes, fallout, serendipity and astute.