I don't know what else to call it, but they are made to dangle off of iThingies. I guess. Basically blind packed minifigs, these come in blind packs. This one is Octoboo. I was super unhapy to get this one at first, since my wife got it because she thought it was a boo. I am warming up to it, though, because it is simply too adorable. Just look at those cheeks!
The things that are attached to the top and bottom unscrew, so if you just want to use it as an enemy for your small vinyl Mario or Luigi figs, you can do it!