When my kids got iPods several yrs ago I set up an Apple ID. When I later got an iPhone I used the same ID. Now they have iPhones. I understand it's best for them to have their own Apple ID. Can they initially connect using my Apple ID to retrieve all their music and apps then change to a new ID? One of my kids already used my Apple ID and downloaded apps. If I now create her a new Apple ID will everything she already downloaded onto her phone stay? How does multiple ID's affect the iTunes account?