These faux-pearl ones are super cheap and amazingly easy to make too!
This would be a great project if you have broken sewing pins. You can't really tell from my photo, but one of the pins I used has a small split on the end which snags fabric, and the other is a bit bent.
Start out with two pretty sewing pins. You may recognize these from my pincushion ring tutorial. I bought a whole box of 50 or so a few years ago for about $2 :)