Have you ever stopped to think about what everything in the universe is made of? Well, everything in the universe is made of something called matter. Matter is anything that takes up space and has mass. That means everything you can touch and see, like your toys, books, and even the air you breathe, is made of matter!

So, what is the smallest unit of matter? Well, that would be an atom! Atoms are really, really tiny, and they are the building blocks of everything in the universe. Atoms are made up of even tinier particles like electrons, protons, and neutrons.

Atoms can join together to form something called molecules. Different atoms can join together in different ways to make different types of molecules. For example, two hydrogen atoms and one oxygen atom join together to make a molecule of water. Different combinations of atoms make up different types of matter, like wood, metal, and even your skin!

In conclusion, everything in the universe is made of matter. Matter is anything that takes up space and has mass. The smallest unit of matter is an atom, and atoms join together to form molecules. Understanding that everything is made up of atoms and molecules helps us understand the world around us and how things are made.