This model has instructions online, and is one of the easiest curved-crease models to create. It just requires six business cards or some other card stock paper, and some means to draw circles. The instructions suggest using a compass or a template, but I just used a poker chip that I had on hand. Once you draw the circles, you should score them, which can be done by pressing hard on a ballpoint pen.
This model was created during a period where I was very interested in trying curved crease origami–it was the first one I tried, I think. Most curved crease origami is not this easy, but the general procedure is usually the same.
I modified the original design by including colored inserts. I’m not sure it’s an aesthetic success, but I like the classic purple/white/gray/black color scheme.