How did the children contributed in their survival against the storm ? In the chapter we r not afraid to die

By providing moral support. Both the kids at a mere age of 6 (Jon) and 7 (Sue) very well understood the crisis they were facing. Jon was so brave that he was not afraid to die and Sue didn't worry her father about the deep cut and blood clot between skin and skull (which took many minor operations to be removed). They showed a level of maturity that at their age was quite unexpected.