Sure, Steve Ramsey of Woodworking for Mere Mortals made these for the 2012 London summer games, but the rings are identical to the ones being used in the Sochi 2014 winter games.
At first glance, they seem very easy to build. But, look closer at how the rings are interlocked, and you will want to know how Steve managed to pull these off. Fortunately, he did a how-to video filled with the techniques and tricks to pull off this complicated project.