To all the people who keep on asking me for instructions on building a replica of Iron Man’s arc reactor (or Wonder Woman’s invisible jet): a) my offer was clearly a joke, b) for the millionth time, I didn’t make the arc reactor, this guy did and c) you’d be better off buying this T-shirt from ThinkGeek. It’s a black t-shirt with a chest-mounted light that looks like the arc reactor in Iron Man 3.
Unlike Tony Stark’s arc reactor, the one on this t-shirt doesn’t provide power. In fact it needs three AAA batteries for it just to light up. The chest panel is connected to a battery box via a cable, but I don’t know where the battery box is located. I hope it’s not too big that you’ll have to tuck it into your pants pocket or something.
You can order the t-shirt from ThinkGeek for $30 (USD). No instructions or assembly required.