PubChem

PubChem is like a big library with lots of books about chemicals. These books have information about what the chemicals look like, what they are made of, and what they do. Scientists use PubChem to find out about different chemicals and how they can be useful. It's like going to a magic bookshop where you can learn about potions, but instead of magic potions, it's information about chemicals that can help make things like medicine, food, and other things we use every day. Just like how you can look up a book in a library, scientists can look up different chemicals in PubChem to find out what they need to know.