What age can a child renew their own passport?

To travel across the USA border, all children regardless of age (including newborns and infants) must have their own passport. Please click on the Related Link below for the official US State Department web site showing what documentation you will need to apply for a child's passport. {Essentialy, birth certificate and proof of relationship to you.} http://travel.state.gov/passport/get/minors/minors_834.html Note: If you are not a US citizen then please reask your question and specify your home country or check with your national government. Requirements may differ in different countries.