To explain the popper jewellery, it works kind of like press-studs. The basic piece of jewellery (e.g. a bracelet) has metal parts on it, into which you can press a decorative popper. The idea is that you can change the poppers as and when you please. If you click the link to my Etsy shop, you'll see a picture of the piggy poppers in place on a bracelet.
There are all kinds of different jewellery options for the poppers - I blogged about them a few months ago: [link]