Sir: The level of violence in the content of children TV shows like Scooby-Doo, Ben10, Chotta Bheem and all other superhero cartoons may create a tendency of aggressive behaviour in children. Children copy things they see in cartoons, hence inculcating a propensity to fight and pick brawls at a tender age. We usually complain about children becoming increasingly aggressive but hardly bother to find the reason behind it. It is the duty of parents to guide their children in this respect and keep an eye on their TV viewing habits. Previously, we used to have innocuous cartoons such as Mickey Mouse; now with the advancement of science and technology, the visual taste of children is tuning into aggressive mode more. ERUM ALI Karachi