Yahoo! Family Account.

Yahoo! Family Account. 

This enables you to create separate Yahoo! IDs for each of your children. You can then control what information your children give to Yahoo!—and determine which Yahoo! features your children can and can’t access.

The key to managing your Family Account is to create separate Yahoo! IDs for each of your children.
There are two classes of children’s IDs available with Yahoo! Family Accounts:

 Under 13 and 13 to 18. Each age class has its own unique restrictions as part of a Family Account.
Under 13 IDs are prohibited from entering any personal information online, participating in auctions or per­ sonals, or accessing any adult areas. The 13 to 18 IDs are only prohibited from participating in auctions and accessing adult areas—but they can leave per­ sonal information online.

In addition, the primary ID on a Family Account (meaning you!) can log into Yahoo! under any of the other IDs. This enables you to monitor and make changes to your child’s account using all of Yahoo!’s various tools—such as blocklists, buddy lists, and so on.

Creating a Family Account is similar to creating a regular Yahoo! account. The big difference is that to establish the age of the primary account member you have to enter a credit card number.
(The assumption is that no one under 18 has a credit card.)

Yahoo! will not make charges to your card; it only uses the card for age ID purposes.

To create your Family Account, go to family.yahoo.com. You should see the Welcome to Yahoo! Family Accounts page; click the Sign Me Up link and com­ plete the steps as instructed.
 (If you already have a Yahoo! account, just enter your Yahoo! ID and Password.)

Once you’ve created an account, you can add a new child ID for each of your children. From the Yahoo! Family Accounts page, click the Add Child Account button and follow the onscreen instructions.