One third of children under 4 have a television set in their bedroom. The average child will see over 20 000 adverts on TV each year. Children between the ages of 6 and 17 spend about five hours a day in front of the TV or computer and only 15 minutes reading books. Do these statistics worry you? They probably should. Increasing time spent watching television has been implicated in many childhood health problems, including obesity and poor diet, use of cigarettes and …