Okay, kiddo, imagine you're at a big party and everyone brings their own snacks in different containers. Some people have chips in plastic bags, some have veggies in Tupperware, and some have cookies in fancy tins.
Just like how there are different types of snack containers, people also have different types of bodies. Some people have light skin, some people have dark skin, and some people have skin that's in between. This is called "race."
Just like how we can tell what kind of snack is in a container by looking at it, sometimes people try to guess what kind of person someone is just by looking at their skin color. But just like how sometimes we're surprised by what's inside a container when we actually open it up, we can't tell everything about a person just by looking at their skin color.
It's important to remember that everyone is different and unique, just like how every snack container is different, and we should never judge someone based on their race or what they look like.