Check Out Glowy Zoey, Dad Made LED Light Suit For Daughter
When I was a kid my family would make their own costumes because it was pricey to buy them and there weren't as many as are available now.
A father made an LED light suit for his 22-month-old daughter, which you can see her delightfully showing off in this video. In a way, it's spooky when it's so dark and you see this stick figure come running at you.
I have tried to make most of my son Sam's costumes so we can have them hang around longer or we can doctor them up for something new the next year by using some of the props.
The Dad that put this together has made some more costumes and made them for kids of all ages. You can see the video below. They can even be made by picking up regular things in the store to have your own. Some lights and a black costume of some sort and you are up and running.