Yep my kid is a dork. And I’m a dork (and masochist for taking this on) that is making her a Tron Legacy costume. So far I have templated out her pants with reflective tape. I also have El-wire which I will be attaching in the center of the reflective tape. I might have to put something over the wire to make it more diffused, but might just say screw it, good enough.
The reflective tape is awesome when hit with a camera flash, but not so great in normal light. Just looks like gray tape. But the goal into be kick ass, at least to a 4 year old.