Wiring LEDs in parallel

I could definitely do some nifty tricks if I did it that way ... something to think about. I still need to figure out what I'm doing when I wire up the eyes, as I figured I'd be doing something interesting there as well.

I'd still need to connect all the negative leads together though, wouldn't I? So I'm kind of back to square one: how the heck do I turn 12 wires into 1?

Again: I've never soldered PC board before so I'm not sure what I'm doing, but I'd assume I could use the center lines on one of these to create electrically common elements?