Think of species like a big family. Just like you have your own family with parents, siblings, and maybe cousins, animals and plants have their own families too. Each species is a group of living things that are closely related, like brothers and sisters. They share similar characteristics and can have babies that are also similar to them.
Imagine a box of crayons. Each color represents a different species. Even though they are all crayons, each color is unique and special in its own way. Red is different from blue, and blue is different from green. In the same way, a dog is different from a cat, and a cat is different from a bird because they belong to different species.
Think about a library full of books. Each book is like a species. Even though they are all books, each one tells a different story and has different pictures. Some books might be about dinosaurs, and others might be about space. Just like books, species have their own unique stories and characteristics that make them special.