What is atticus response to Alaxanders attemp say the children have witnessed trial?

Atticus responds to Alexander's attempt to say that the children have witnessed the trial by telling him that he doesn't want them to be exposed to the harsh realities of the trial. He says that they are too young to understand the complexities of the case and that it would be harmful for them to be present. He also says that he doesn't want them to be influenced by the opinions of others and that he wants them to be able to form their own opinions based on the facts of the case.