The mask. Synonymous with the theater, it is one of the most versatile yet essential elements of any good costume. Plenty of lesser mask-peddlers will only sell them to you pre-decorated, with all the fun removed, but we leave a few of our masks plain so that creative types like you can go crazy. Add paint! Add sequins! Add a battery pack and a couple of little flashing lights! The mask is yours now, so make it your own (but be careful with fire and electricity!). Of course, it's just as good at concealing your secret identity with or without extra decorations. Plus, if you leave it white, it will magically transform almost any other costume into a spookier version of that same costume. You could be a ghostly pirate queen! A scary carrot! We're getting creeped out just imagining the possibilities.