Why did Mrs Johansen tell Annemarie to act silly?

Mrs. Johansen told Annemarie to act silly as a way to distract and protect her during a tense moment when they encountered German soldiers. By behaving in a carefree and playful manner, Annemarie could deflect suspicion and ensure that the soldiers did not investigate further. This strategy was part of the family's efforts to stay safe while resisting the Nazi occupation. It highlighted the importance of quick thinking and the need for children to remain innocent amidst the dangers surrounding them.