Kids and cleaning their rooms

I´m trying to teach my kids how to clean their rooms by themselves, because I think that they are old enough to learn that now. They can help each other when they are going to vacuum-clean and dust, and they can cetainly tidy up by themselves when they have their toys all over. They can also learn how to make their beds by the way, that shouln´t be so difficult if they help each other. I think that I´m going to come up with some kind of reward that they can have hen they have done a good job with their cleaning.