Project Feasability-voice change, LED functions

First time here. Just purchased a Mega and am getting the lay of the land.

I am a cosplayer and had an intriguing idea for my current costume. It's a combination of several things and am curious if I need separate Arduinos to accomplish my goals or if one can run them all.

First I am looking to add a voice changer. 2nd, a voice controlled LED in an amulet on my chest. And the last is LEDs in the gloves I'll be wearing. I may be looking pie in the sky, not sure. But before I get too far into hopes and dreams, I want to be sure it's even possible to do this.

Would I be able to run wiring that far. Say from inside the helmet to elsewhere on my body?