Our Paper Clip puzzle may have a simple appearance, but this does not reflect its true nature. Although mathematically similar to the classic Ball & Ring puzzle, Paper Clip presents a greater challenge.
Paper Clip is a very deceptive puzzle and is not for beginners. A few of the steps may seem straightforward, but many of them need to be "just so" before proceeding. If not done properly you're sure to find yourself backtracking.
Puzzle considerations aside, the tale of the simple paper clip is quite interesting. Check it out at http://en.wikipedia.org/wiki/Paper_clip.