You can call Apple to reverse the charges. In app purchases isn’t the only thing to worry about. Once you enter your itunes password, it won’t prompt you (or anybody using your device) for a password for something like 10-15 minutes. So if there is a prompt to upgrade to a paid version, or to buy a different app and your daughter clicks it, you’ll be paying.
You can go to General – Restrictions to disable in app purchases too.
