I love stuff that glows in the dark! How about glow-in-the-dark Jell-O? Yes, you can use it with Jell-O shots, but you need a black light. I recently got glow-in the-dark paint for the garden and felt like the Red Queen having her knights paint the roses red.
Years ago, when I was a kid, there was weird glow-in-dark putty (it tasted great, I think I ate enough to homeopathically prevent radiation poisoning!).
Sadly we don’t have lightning bugs in Los Angeles, but I love looking at biofluorescent fish!