When to buy your kid a cellphone?

Despite the trouble they bring, every year Clark said she

The parents, teachers and police officers trying to instill some healthy fear of the Internet in today’s teens have their work cut out for them.

Fighting their own lack of knowledge, an ever-shuffling mix of popular apps and games, poorly regulated social media sites and inescapable WiFi availability, shielding teenagers – and often kids much younger – from the Internet is nearly impossible.