Pro family versus cancer. If and how should parents tell their children about their cancer? Children react differently to cancer depending on their age. A preschool child, for example, may begin culpable processing that leads to magical fantasies, with destructive thoughts of having caused the disease. The Regine Sixt Children's Aid Foundation supports the FreiRaum group, which addresses such issues in cooperation with the psycho-oncology department of the Hospital of the University of Munich.