Iron Man gear is all the rage these days, thanks to the popularity of the new hit movie. We recently went to my nephew's fourth birthday party, and as a gift, he received an Iron Man mask and an arm attachment that shoots discs. Ah, the weaponry a four-year-old apparently needs....

If you've got an Iron Man buff in your household, why spend the money on a store-bought mask and arc reactor when you can build one yourself? Details after the break.