One of my many wacky hobbies now includes -- building igloos! This might be useful if I ever go winter camping or ice hiking.

FYI: The product I am using to build this igloo is called the "ice-box". Its a neat tool, although I wish it was made from more reliable materials (the plastic parts don't seem all that strong). It is also way overpriced. Hopefully there will be a more affordable version one day. In the meantime, this is a good way to teach someone about catenary curves, not to mention one more survival skill.