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That was unexpected.

If you haven't watched the video yet, do it now. Some cool juju.

When I was a kid there were cheap fireworks which I believe used a similar chemical. It was amazing to watch them grow.

http://www.youtube.com/watch?v=F3aAksyabes#t=0m15s

I loved them too.

Most of these (at least now) are made of sugar and baking soda. They used to be made of mercury thiocyanate back when we didn't know mercury poisoning was trouble.

Ah, brings me back to the chemistry experimentation of my youth! :-)

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