[Jeri’s] back with a series of videos that outlines the step-by-step electroluminescent wire ... a dielectric to get the job done. For wire, [Jeri] uses one strand of enameled magnet wire ...

Electroluminescent wire is what makes these costumes glow and if you’ve never worked with the stuff before you’re in for a treat. Adafruit posted a tutorial explaining how to work with EL wire.