While camping, I noticed that if you look long enough at almost any star, you start seeing some tiny, subtle colors in that star. Even crazier, they sometimes flicker between more colors. In my case orange, blue and something like cyan.
Besides constellations, what else could you observe regarding starts, with the naked eye?
Many stars are double stars, some you can see with the naked eye, some you can’t.
The most well known pair is Mizar and Alcor, but you need very good vison, and very clear, dark skies to see them both.
https://earthsky.org/brightest-stars/mizar-and-alcor-the-horse-and-rider/