This article also from US Cyber Security is "Cyber Security Tip ST05-002: Keeping Children Safe Online".

Link to article: http://www.us-cert.gov/cas/tips/ST05-002.html.

Although Christina is a little young to be overly concerned about her online habits, I don't think it is anything to be relaxed about. As the internet becomes more common place it is a beast to contend with.

An example is the iPad Christina has begun using as a communication device. Christina has only started using it and has a long way to go, but the possibilities seem endless with the various accessibility features.

It is better to be prepared as Christina gets older. I would say the best precaution and to make the most enjoyable experience for Christina is to be sure to educate Christina about the world wide web.