A collaboration between the charity Hoxton Street Monster Supplies (a kids educational & reading charity, they do great events!) and Tatty Devine, our local laser-cutting jewellery geniuses, this beautiful AARGHHH necklace that I am now wearing with evil delight.
They sent me this, and I can't yet find any link on either site to where you could purchase similar; maybe it's just a promotional thing? But there's plenty of other amazing things at both sites: Tatty's original aarrghhhh necklace and a jar of Thickest Human Snot, for instance.
Update: available from both on 6 November!