I wanted to wear an Iron man costume for a birthday party but the problem was the cost! If I wanted to buy one on ebay or elsewhere it was quite expensive.
I just bought the mask for 10€.
Then I bought a unibody lycra red costume and some fabric paints.
I add some spare blue led so I did a cheap heart and a lighting mask.
The cost is about 40€
Step 1: Lighting the mask
I have done a really poor job on the mask but I have done it really fast as I had a week to do it !
No switch just a magnet!
no batteries handler just cable straight soldered on them!
For a night it was enough if necessary I could improve it.