London 2012 Logo, Ryan MacDonell
Folded from a 26 cm square of tissue foil.
I've had this idea for months now, and I started working on it over a month ago. Unfortunately, I didn't feel much like folding after work most days. I finally folded a few more drafts and the final model over the weekend. With a completely free-folded model like this, tissue foil isn't very forgiving but it was my only way of getting the colours I wanted.
More details (and CP) on my blog.