Phys-lers: My children now remind me that when they were young, I did some
demo for them which had to do with a mini-volcano -- a small pile of some
stuff with some sort of something inside which reacted in some way -- You
can see that the procedure is crystal clear in our minds currently. I
doubt that it was a fiery action -- I would not have put gun powder in a
pile of sand for example -- Maybe a frothy substance belched out of the mound.
They now want to repeat this for their children -- Look what I have wrought!