How to make an igloo

What could be more appropriate than knowing how to build an igloo in this winter weather? Not that I plan on doing this anytime soon, but I like the idea of it. Actually executing it would most-likely be problematic, but how fun would it be to say you made your own igloo?

How To Make an Igloo 

Finished Igloo 
http://www.i4at.org/lib2/igloo.htm