Okay kiddo, imagine you have a group of friends who all live in different houses. Sometimes you all like to play together, but each house has different rules and toys.
Now, adults have countries instead of houses, and they like to work together too. In North America, there are three big countries: Canada, the United States, and Mexico. Just like your friends, they have different rules and toys too.
Some adults think it would be better if the three countries could work together more closely, like a big team. This would mean making new rules and sharing toys more easily. They call this team the North American Union.
But not everyone likes the idea of the North American Union. Some people worry that it would change their country too much or that they wouldn't have as much control over their own rules and toys.
So, the North American Union is still just an idea, and there are people who both like and don't like it. It's up to the adults to decide what they want to do.