Glow Stars were little white pieces of plastic in the shape of stars that came with sticky putty to make them stick on your wall or ceiling. I think these are still around and pretty popular too. Glow Stars were an important part of growing into an individual. When a kid put up their first glow stars on the ceiling, it felt like they'd claimed who they were as a person. The funny thing about that is that everyone had them, so it wasn't that individualistic, but it sure felt that way.
Glow in the dark is a pretty popular feature when it comes to anything, but is it really that cool? Have you ever seen anything that glowed impressively in the dark? It's always a weak, faint glow. The science aspect of it is cool, but that's about it. Don't ask me to explain the science aspect of it though. I have no idea how it works. I just think it's cool that it does work.