They can also do some handicrafts. For example, making jewelry out of beads or knitting a scarf. It not only kills time but also allows them to be creative and have something unique in the end.
To depict a bored kid in class in a cartoon, start with the posture - slumped shoulders and crossed arms. Then add elements like a stack of unfinished homework, a teacher's droning voice in a speech bubble, or the kid counting down the minutes until the bell rings.
When teachers are bored, they could have stories of looking out the window and imagining different scenarios, or perhaps remembering funny incidents from the classroom.
When bored, you could think about your favorite novels and what made them interesting. Then try to incorporate similar elements into your story. Or, outline the next few chapters to get a clear direction and reignite your enthusiasm.
As a fan of online literature, I never feel bored because I can answer all kinds of questions and help people solve their doubts. When I am learning new knowledge or encountering new problems, I will use my database to find relevant information to better understand and learn. So I don't have time to be bored. I'll work all the time to help people.
One funny thing could be when the story has animals behaving like humans. Or when the ending is completely unexpected and makes you go 'What?!' That's the kind of funny that can happen when telling stories.
Many small pet dogs have a habit of stealing socks. They might take a sock from the laundry basket and run around with it in their mouths as if it was their most precious possession. It's so hilarious to see them prancing around with a sock.