The history of the hula hoop, as best as I could find it. This is definitely a topic that you can bring up in any social situation, even when your new friend's kid is staring at you in amazement and you're unsure how to make it stop. 

Sources:

https://www.museumofplay.org/toys/hula-hoop/

https://en.wikipedia.org/wiki/Hula_hoop#:~:text=The%20modern%20hula%20hoop%20was,company%20and%20became%20a%20fad.

https://www.history.com/this-day-in-history/hula-hoop-patented