For this Iron Man shirt, I started out with a plain red shirt. I carefully cut out the design that is on the Iron Man suit. I then attached a piece of sheer yellow fabric to the inside of the shirt under the cut out. I took another piece of fabic to make a pocket behind the sheer piece of fabric. I had a tap light I got at the dollar store. Insert the light into the pocket and touch it to turn it on. Even though he has a store bought Iron Man costume, He loves this shirt that he can wear anytime.