I found out about "Kawasaki Rose" on my friend's, Andy's, blog.
It is amazing that this beautiful rose is made by a piece of origami.
I tried to make "Fukuyama Rose", which was arranged by Japanese Highschoolers from the "Kawasaki Rose".
Although you need to spend an hour or so to make this rose, it's worth it.
You could find "how to" here. It's written in Japanese, but the pictures will help you to make it.