https://www.protectmichild.com/

The Michigan Children's Protection Registry is a secure database of protected e-mail addresses. It allows Michigan's parents and schools to register e-mail addresses that children may access.

Children are forbidden from purchasing certain products and services under Michigan law. Once an e-mail address has been registered, senders of e-mail messages that advertise or link to prohibited products or services are required to remove the address from their mailing lists within 30 days.

Sounds like a good idea to sign up for.

May not have kids but since my Hotmail account gets a shitload of penis enlargement ads this could help.