Usually the big ones, but those are a bit heavier to carry around.
Book: I like to read occasionally.
Laptop (pc and or my electronical devices would be a bit hard to carry): I love to play around with computers and or devices.
Some examples are a arcade and digital full-size pinball machines that I build together with some people. It’s not just behind a pc, but but really those machines aren’t meant for transport.
Headphones: I love to listen to music while working or just to relax.