you go into it really does depend on the individual child's understanding and interest. usually, it is best to keep things as simple as you can.
they might think it is their fault that you are ill because they haven't behaved well enough or because they were once cross with you.
teenagers can also find it hard to cope with cancer in the family. just when they want to get away and become independent, they feel that they ought to be at home. this can make them feel guilty too.
it is helpful for their parent to have a quiet word with their class teacher if the child is at school and someone 