How do you delete a duplicate account for a child that is under 13?

Hey there, cboggs_14!

Thanks for dropping by the Apple Support Communities. From your post, I understand that your device became unresponsive while trying to set up a child Apple ID for your child, and somehow two Apple IDs were created for them. I'm happy to get you some help!

Based on what you've described as going on, I would recommend getting in touch with Apple Support directly for help with sorting out the accounts. You can do that by finding your country in the following article and using the contact information provided: Contact Apple for help with Apple ID account security - Apple Support.

Have a wonderful day!