The Bracelets Came With Pyrotechnics Inside
Special effects were used to bring the superheroine to life every time she had to deflect a gunshot, which was a lot of the time. Remember, this was before computer-generated imagery (CGI) became ubiquitous. In order to bring the effects to life, the executives had to rely on technical wizardry on their part. The stars on the bracelets were actually miniature fireworks with wires attached, so they looked like real stars. To get the sparks to fly, she only had to touch a button when they were needed.

The Bracelets Came With Pyrotechnics Inside