Inspired by the segment in his show where Brian Cox made his own little cloud chamber out in the African bush, I've checked out instructions on several web sites about how to make them, and want to make one this weekend. I know where I can get dry ice not far from my home. Not sure about the isopropanol of strong enough solution*, but I am inclined to try Isocol rubbing alcohol first even though it is only 64%. (They recommend using 90% concentration if you can get it.)
I also have a large empty olive can which I want to use boil water, seal and pour cold water onto it. (Actually, just doing it this way with an aluminium can looks pretty impressive too.)
For the evening, I might even try cornflower firebreathing.
Yes, it is a weekend of science coming up. It's a good thing I have children to do this with, otherwise my wife would think I am rather odd. (Too late to worry about that, perhaps.)
* Update: it looks like I can get a small bottle from Bunnings.
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