One of the neat costumes I saw at Dragoncon was this one: which I asked if I could take so that I could use a flash a get a good shot:
She's dressed as the title character from the Electronic Arts game American McGhee's Alice:
The game is a very dark adventure in the world of Lewis Carrol's Alice in Wonderland. (The wikipedia article on the game probably has spoilers.)
You pick up various "toys" in the game that are your weapons. There are multiple copies of each weapon in the game, some of them hard to get to. I didn't realize when I was playing the first time through (when the game was still fairly new) that getting a weapon multiple times makes it more powerful. More than half way through the game, I ended up stuck in a boss fight. Looking through some on-line strategy guides, I found out my mistake. I didn't have the heart at the time to start the game over, but now a few years later, I think I'll take this chance to give it another try. For those who know the game, I'm playing on "medium" difficulty.
The Cheshire Cat goes along in the game and has advice and tips for you. Here's my favorite bit; it's when you get the Vorpal Blade at the beginning, which is your base weapon.