Create apple id for a child - credit card required
I installed iOS 8. I turned on Family Sharing, and tried to create an AppleID for my son (who is 5).
No matter what I do, the setup fails, asking me for a credit card (see attached image for screenshot). I have a valid card associated with the account (on first try, the setup asked me for the security code, which I supplied). I have added this card back in on iOS and on my Mac using iTunes. It never accepts that I have a card added to the account. Which means I can't add an AppleID for my son. What gives?
iPhone 5, iOS 8, 32 GB