Parents need to know that there are quite a few ads, including a "You've won our hourly prize!" banner at the top and an ad box on the right. If you pay an annual subscription fee you'll get additional content and an ad-free version. The site also offers "iPoints" to members who "bring in a buddy" by challenging a friend to a game or emailing an activity to a pal. Kids should be reminded that they should respect others' privacy and not disclose email addresses without permission.