That's cool...
And, no, analog models are not evil!
Analog modeling in geology is not only a teaching tool, but a way of understanding physical processes, especially in structural geology. Here are some simple analogs, some of which are edible.
One analog that is used a lot is a sand-box. (geology is fun!) Very useful for modelling geologic structures.
sandbox analog
modeling a fold-thrust belt with a sand-box
physical analog Modeling
Then there are flumes which model sedimentary processes.
But the best kinds are like Nick's whiskey experiment!
Thanks for the link.