A talking tree that gives really bad advice could be a great addition to a story. For example, it tells a hero to go left when right is the way to safety. Also, a person who can't stop hiccupping and every hiccup makes something strange happen, like a light bulb exploding or a flower growing out of their nose.
How about a character who is constantly getting lost in the most obvious places? They could be in a small room and still be unable to find the door. Or a group of pirates who are terrified of a little kitten on their ship. It's the contrast between their tough image and their fear that makes it funny.
Putting up a picture of you and your friends in a really awkward group pose can be funny. Or share a story about the time you got lost in a very familiar place because you were distracted. A video of you attempting to do a difficult yoga pose and ending up in a tangled mess on the floor is also a great funny thing to put on your story.
Snapshots of your daily walk in the park. The beautiful scenery, the blooming flowers, or the interesting people you meet along the way. It gives a sense of your daily life and the things you find interesting in the world around you.
Illness in the family. When a family member is sick, especially if it's a serious illness, it brings so much worry and stress. You see them suffering and feel powerless to make it all better.
Sure. Knock, knock. Who's there? Boo. Boo who? Don't cry, it's just a joke. This is a simple knock - knock joke that can be used in a light - hearted children's story or a story with friendly characters having a bit of fun.
You can put in some talking animals. For example, a squirrel that loves to recite poetry. It could add a lot of humor to the story.
A character who has a magical object that does the exact opposite of what it's supposed to. Like a pair of shoes that are supposed to make you run fast but instead make you stick to the ground and waddle like a duck.
A character with a really strange phobia, like being afraid of round things. So every time they see a ball or a plate, they start screaming and running away. It's a simple yet effective way to add humor.
Well, in a dystopian story, you could say 'The curfew is so early, the bats are still out when we have to be in. I think they're plotting against us too now.' Also, 'The food pellets they give us taste like recycled dreams. I'm not sure if that's a good or bad thing.' And 'The mind - control helmets? They look like really bad hair dryers. I bet they won't even style your hair while they mess with your thoughts.'
A witch's curse. Maybe a family is cursed by a witch from centuries ago. Every generation experiences a strange illness or misfortune. For example, the children might have nightmares that seem all too real and start seeing a dark figure in their rooms at night.