What are two or three neutrons?

Neutrons are like invisible building blocks inside atoms, just like bricks are inside a wall.

Imagine you're playing with lego bricks, and some of them don’t have any color, they’re just plain, neutral bricks. That’s kind of what neutrons are: tiny particles that help make up the middle part of an atom, called the nucleus.

If you have two or three neutrons, it's like having two or three plain lego bricks. On their own, they don’t do much, but when they join other particles inside atoms, they help make different kinds of matter.

For example, if you take an atom and change the number of neutrons in its nucleus, you get a isotope, like how changing one brick in your lego tower can give it a whole new look.

You might not see them, but neutrons are all around you. They're inside the atoms that make up everything: your toys, your food, even the air you breathe! So when we say two or three neutrons, we’re talking about a small group of these invisible helpers, working hard to keep the world together, just like lego bricks keep your tower standing.