> When we think she’s mature enough (an important distinction from her being technically old enough), we’ll hand her an envelope with her master password inside

> When we think she’s mature enough (an important distinction from her being technically old enough), we’ll hand her an envelope with her master password inside. Let me guess. She'll probably reject that envelope for the following reasons: 1. The account is known to be compromised (being under a third party control). Even if parent credentials could be removed, there's still a possibility they could gain access with social engineering with support, as they know detailed history of the account. 2. Unless she's completely monitored and barred from any network access, she'd probably already have another set of accounts by that time. Otherwise would signify she doesn't need any. 3. By that time she'd have her own perception of her own identity, that would be likely (but not necessarily) different from her parents' view of the time she didn't have much of personality - which is enough of a reason to reject the mismatching accounts and create ones to her own tastes.