Okaaay... I now have a couple of LEDs to play with. I'm planning to make a LED cube for fun (it's much safer than a bomb). I need to find a drill bit so that I can drill holes to a plywood. I need the holes to hold my LEDs while I solder it.

I'm planning to make a 4x4x4 LED cube. I was wondering how to wire this thing, until I discovered the concept of multiplexing.

So that's how you chain devices together using only one cable... Now I know.