UPDATE – 12/7/13
FYI, this video is still valid, but you should know that the spines are heavy. The Spinsterz are working on another video teaching you how to make a flexible spine fire hoop and it should be out before Christmas!
Learn how to make a collapsible fire hula hoop!
After a ton of hours into this project I have finally finished it and it is available for viewing here http://www.thespinsterz.com/how-to-build-a-fire-hoop.html
The video below is a 3 minute condensed version that gives you the basic idea of the longer extended version on my website. The extended version is about 1 hour long and packed full of great info.