Okay, so imagine we have a big book with all the instructions on how to make a person. This book is like a library, where each chapter tells us how to make different parts of the person, like the eyes or the heart.
Now, scientists want to study these instructions, but they can't see or touch them like they would with a normal book. Instead, they have to take all the tiny pieces of the book and put them into a special container called a genomic library.
This library is like a big box filled with tiny pieces of the book that tell us how to make a person. Scientists can then take out one piece at a time and read it using special tools to help them understand what it says.
By having all these pieces in one place, scientists can study them and learn more about how our bodies work, and even find new ways to help people who get sick. So, think of a genomic library as a big box filled with tiny pieces of the instruction book on how to make a person.