Here's a list of bedroom cleaning tasks kids can generally do by age.
Remember, the age recommendations are just that, recommendations.
Your tidy 11-year-old who has been cleaning his room since age 2 can probably tackle some of the chores listed for teenagers if safety isn't an issue.
Conversely, if you've been the maid for your 13-year-old since she was born, you might have to start her off with some of the simpler chores recommended for younger children.
Of course, some of these chores need to be done each day, others once a week, and still others once a month or even less frequently. Use your best judgment for what gets done when.
Once a child reaches a certain age or skill level, he can generally do the bedroom kids chores for his age group and the age groups below.