For many kids, the Internet is at their fingertips. From laptops and tablets to smartphones and game systems, a web of information and entertainment is open to them. According to a new report from the Pew Research Center, about three out of four kids ages 12 to 13 access the Internet using a mobile device at least occasionally. Many younger kids are online too. But are Internet users being cautious enough?

Julian Zeitlinger, 9, from W