I've just had a message from school that they are supporting a local little girl's family to raise money to send her to America as her brain tumour is inoperable in the UK. They are doing a non-uniform day (with non-compulsory donation £1) and the children can wear blue if they wish as the little girl's favourite colour. They are also having a cake sale. Obviously my heart goes out to this family and we will be contributing as much as we can...but I'm not sure how to talk to 7yr old DD about it without frightening her? Any advice?