For most parents, teachers and youth workers, getting to grips with new technology is a huge challenge - Twitter, Facebook, blogging, chat rooms, email, the internet and beyond - and as technology changes and young people grasp it faster than the older generations do, it can be a real struggle to know what to do to help, equip and defend. Keeping our children safe is of critical importance and a huge source of concern for many. Dr. Bex Lewis shows us how.