Okay, so imagine you are playing with legos and you have a lot of different colors of legos. And let's say you accidentally drop some of your legos outside and then you bring them back inside. But you don't remember which legos you dropped and which ones were already inside.
Now imagine you have a machine that can look at each lego piece and tell you exactly which ones were outside and which ones were inside before. This is kind of like what DNA profiling is.
Our bodies are made up of tiny things called cells. And inside each cell, there is a thing called DNA. Just like legos, DNA has different "colors" or "pieces" that make up who we are.
Sometimes, we need to know whose DNA is whose. Maybe there was a crime and the police found some DNA at the scene. Or maybe a baby is born and we need to know who the father is. That's where DNA profiling comes in.
Scientists can use a special machine that looks at the "colors" or "pieces" of DNA in someone's body. They can compare that to someone else's DNA and see if they are a match. It's like putting the legos in the machine and seeing which ones were outside and which ones were inside before.
This is really helpful because no two people have the exact same DNA. So if we find a match between someone's DNA at a crime scene and the DNA of a suspect, it can help us know if that person was really there or not.
Of course, there is a lot more to it than just legos and machines! But I hope this helps you understand the basic idea of DNA profiling.