DD still believes and, as today is her final day in primary school, I'm wondering how I should gently tell her that it's all make-believe 
She is an anxious child sometimes and will be angry with me for shifting her world like this, but I can also predict that she'll be hurt if I don't tell her and she's crushed at comprehensive by other kids.
She definitely believes. She has no access to social media or unrestricted internet access. How do I handle this?