What are some fun and discreet things to do in class to make the time go by quickly?

I'm currently a junior in college and feel like I relied way too heavily on my laptop to distract me from really boring gen-ed classes, mostly playing pokemon on an emulator. Now I don't have a laptop and am pretty bad at drawing (which I feel like is the go-to thing), so I was curious what other methods people had for having some quiet fun in boring classes.