to hold together papers, bookmark pages of a book, or just attach them on your bag because they're pretty adorable.
I use mine to bookmark my journal. I hate flipping through my (many) journals to find what page I was on last. Therefore, that is Shappo's job!
There are four Sentimental Circus Bookmark Clips to choose from. If you have some semblance of self control, you could just pick one for $3.25USD.