The Framework Convention for the Protection of National Minorities is like a set of rules that helps countries protect the rights of people who belong to minority groups.
Imagine you have a group of friends who all like different things - some like pizza, some like sushi, some like hamburgers. But, you all still play nicely together and make sure everyone gets to have a turn in choosing what games to play. This is like how countries should treat people who come from different cultures or backgrounds.
The Framework Convention helps governments make sure they aren't treating minorities badly, and that they have the same rights as everyone else. It helps countries make sure that minorities have the right to use their own language, practice their own religion, and participate in their own culture.
Just like how your parents teach you to share your toys with your friends, this Convention helps countries share their resources and opportunities fairly with everyone, no matter who they are.