They are brief. Usually, just a few sentences can tell the whole story. For example, 'A frog wanted to be a prince. He kissed a lot of things but just got warts.' It gets to the funny point quickly without a lot of build - up.
Sure. Here's one: A fish went to a party. When it left, it said, 'Oh, sea you later!' Another one: A snail bought a new car. He got in and it took him two hours to get out of the driveway.
Another characteristic is simplicity. They often have a simple plot that can be easily understood. A short and simple situation like the snail getting mugged by turtles is easy to grasp and the absurdity of it is what makes it funny. The humor doesn't rely on complex setups or long explanations. Just a quick and simple scenario that tickles your funny bone.
Sure. Here is one: The little star was lonely in the sky. One night, it saw a child looking up. The star twinkled extra bright and the child smiled. Then the star wasn't lonely anymore. Good night.
One characteristic is that they are simple. They usually have a straightforward plot that kids can easily follow. For example, a story about a cat chasing its tail can be short and funny. Another characteristic is that they often have humorous characters. Like a clumsy bear that always trips over its own feet. Also, these stories usually have a quick resolution. They don't drag on for a long time so that kids can fall asleep with a smile on their faces.
Reading funny short bedtime stories can help you relax. When you are relaxed, it is easier to fall asleep. For example, a humorous story about a clumsy cat can make you laugh and forget about the stress of the day.
The humor in them is often based on unexpected twists. In the mouse superhero story, the mouse thinks it can fly but ends up with a different 'power'. It's this kind of sudden change that makes kids laugh. And they are short so that kids don't lose interest before falling asleep.