Last couple of Halloween's I just threw on a full 'ninja' outfit. Since I lived in a quiet, rural neighborhood, it wasn't at all unusual for the little kiddies to step inside so that they couyld take their choice from a failry wide selection of candy and check out the slew of decorations that the ex would cover the entire kitchen with.
I think the highlight of one of those was some little 6 year old boy, also dressed in a ninja outfit, who looked up at me and asked in a trembling voice...
"Are those *real* nunchucks?"...
He went even more wide eyed when I let him hold them for a moment.
(I didn't add "And this is a real sword, and these are real shuriken, and these are real throwing spikes...", didn't want his parents thinking I was some kind of weirdo...
)
Year before that, I was a 'samurai'...
(and yes, that's a real sword, and real armor...)
If I go to a Halloween party this year (which is unlikely), I'll probably just add a tai-chi sword to this outfit and go as someone from 'Crouching Tiger, Hidden Dragon'...