I personally think it's a terrible idea, it will definetley increase the number of eating disorders in children. Children as young as 7 have been diagnosed with anorexia and i think lots of it is down to this huge pressure from the media about the way people should look. Children, especially at primary school age should not have to worry about their weight. I think weighing the children will make them become obsessed with their weight, shape and size and there would probably be a lot more bullying about the way children look