partial to this....did volcano for my 8th grade science fair project.
but this one is so much more tasty!!!!
http://images.google.com/imgres?imgurl=http://www.finkbuilt.com/static/images/articles/cake5.gif&imgrefurl=http://www.finkbuilt.com/blog/%3Fp%3D61&h=337&w=400&sz=10&hl=en&start=81&tbnid=cfTXhntsvydhOM:&tbnh=104&tbnw=124&prev=/images%3Fq%3Dcake%2Bdown%26start%3D72%26ndsp%3D18%26svnum%3D50%26hl%3Den%26newwindow%3D1%26safe%3Doff%26rls%3DGGGL,GGGL:2006-25,GGGL:en%26sa%3DN
Doug,
I said the title of the thread and my son came running... we have to do this one just for fun!
Thanks for the link. 
I did a volcano cake once, though it was different from what was listed in that link. I didn't use dry ice as it can be expensive as well as dangerous to tough with bare hands. I did find a link to some instructions on how I made mine:
http://www.disk-o.com/disk-o10/recipekorner.html
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