Near the end of highschool I bought a weighted pen intended for pen spinning. I looked up some basic spinning tutorials online and learned to spin it around my thumb and between my index and middle finger. From there on I just played around with it a bit more, and came up with various other (basic) spins by myself. There aren't too many variations I can do, but enough for it to look somewhat interesting.
I don't pracctice actively with pen spinning anymore, but I've noticed almost anything that's thin and long can be spun. So I quite frequently try to spin random objects such as remotes, sticks, my phone, food, etc.
Below are some videos of me spinning things. They are vertically recorded because they were intended to be posted on instagram instead of youtube.