Okay kiddo, so the Royal Dutch Football Association is an organization that deals with a sport called football, which is the sport that Americans call soccer. This organization is from the Netherlands, which is a country in Europe.
The Royal Dutch Football Association is like a boss for all the football teams in the Netherlands. They make rules for the game of football, they organize tournaments and matches, they teach people how to play football and they also take care of the national football team of the Netherlands.
The national football team of the Netherlands is like a really special team that plays against other countries. They sometimes wear the color orange and have a lion on their shirt. They are really good at playing football and the Royal Dutch Football Association takes care of them to make sure they play well and do their best.
So, basically, the Royal Dutch Football Association is like the leader of football in the Netherlands and they make sure that everyone plays the game fairly and has fun doing it.