I've trying to setup Family Sharing for my family. I have my email address setup as the main account and I've added my wife successfully. The issue comes when I try to add my kids who are 9 and 7. They both have personal email addresses linked to Apple IDs. Is it possible to have them setup as child accounts so that I have to approve their purchases? In the Family Sharing setup on my phone I can see that you can create a Child Apple ID, but I have to use @icloud.com for the account, can I use a personal email address instead?