How do ernesto in barril boy and the boy in "a day's wait" what shows bravery?

The story emphasizes the misunderstanding of the 9-year-old boy and his father.  The fact that the boy listened the doctor explain to his father about the temperature that should not go over 102 degrees, makes him be confused and the way of expressing it is refusing to sleep because he thought he could die. Finally the father explains the difference between Farenheit and Celsius and this way the boy starts to be more relaxed. The boy at the end is a bit more comprehensive about little things in life.

i'm not good at running