Tag site for child-directed treatment
Please visit this page in Webmaster Tools to tag a site or service that you would like Google to treat as child-directed in whole or in part for the purposes of the Children’s Online Privacy Protection Act (COPPA). If you have not already added a site to Webmaster Tools, you will first need to add the site and verify ownership.
Note that you can tag an entire domain or portions of a domain (subdomain or subdirectory) for treatment as child-directed, and the lower level pages will also be covered by the tag. It may take some time for this designation to take effect in applicable Google services. Google may limit the number of domains or sub-domains you may include at any time.