Preon

Imagine that the universe is like a puzzle made up of tiny pieces. These pieces are called particles. Now, scientists believe that there might be even smaller pieces than particles. These really teeny-tiny pieces are called preons.

Preons are so small that even powerful microscopes can't see them. However, scientists believe that they exist because they might be able to explain some mysteries of the universe, like why particles have different masses.

Think of it like this: You know how different Lego blocks have different sizes and shapes, and when you put them together, you can make different things? Well, particles are like Lego blocks. They come in different sizes and shapes, and when they come together, they create different things too.

Now, preons are like even tinier Lego pieces that might exist inside the different particles. Scientists think that if they can understand how preons work, they can understand how particles get their size and shape.

So, it's kind of like trying to solve a really complicated puzzle by looking at the tiniest pieces first. And preons might be the key to solving this puzzle.