From Wikipedia:

In common usage, “chaos” means “a state of disorder”.[11] However, in chaos theory, the term is defined more precisely. Although no universally accepted mathematical definition of chaos exists, a commonly used definition originally formulated by Robert L. Devaney says that, to classify a dynamical system as chaotic, it must have these properties:[12]

1. it must be sensitive to initial conditions
2. it must be topologically mixing
3. it must have dense periodic orbits

I’m not positive, but I may have managed to illustrate this theory practically by mixing a toddler and 13+ puzzles.

You’re seeing the results of a few hours work reversing the experiment. I anticipate a few more hours. Note: the piles of puzzle pieces in a few of the boxes do not correspond to the boxes in which they rest.

Tip: If this ever happens to you and the pieces are if similar size, sort the pieces by the color of the backing first.