[DIY Vampire Fangs](http://www.makezine.com/blog/archive/2007/10/diy_vampire_fangs.html?CMP=OTC-0D6B48984890).
Bit too complex for me, but could be fun if I ever decide to go to a halloween party.
(Which, in turn, would more or less require me to be in the US, as thats the only place I’ve ever seen Halloween ever treated ‘all out’)