African countries are working together. They want the world to say sorry for colonial times. Colonial times were long ago when European countries ruled Africa.
They say the old rulers did very bad things. They took land, money, and many beautiful objects. These objects are now in European museums.
The countries want their things back. They also want money for what was taken. They say this is not a gift. It is the right thing to do.
They are talking together to make their message strong. They want to make new rules for this. It is a big talk for the world.