This is essentially related to the Federal Children's Online Privacy Protection Rule: Children’s Online Privacy Protection Rule: A Six-Step Compliance Plan for Your Business | Federal Trade Commission
Peddling software or a process which may require personalized information from a person younger than 13 is not OK under the law.
Thanks for your reply.
I understand now why
Shame there isn't a way where the parents can sign up for it on their behalf. However the law is the law!