After I saw coocoosnest beautiful Window Treatments (https://www.craftster.org/forum/index.php?topic=397365.0) I had to try this awesome technique.
I watched some videos and made a sampler piece and then a hat. I just love how it turned out and can't wait to do the next project with interlocking!
Here is the right side
And this is the "wrong" side
The obligatory action shoot
And the sampler thingy i made to understand the technique:
c+c are very appreciated