This guide to bedroom kids chores by age can help keep cleaning expectations for children realistic. Keep in mind, however, that these 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 the simpler chores recommended for younger children.
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.