Put your right hand in the cold water. Leave both hands there for 1-2 minutes. Then, put both hands in the room temperature water. Explain this . Once you can explain this, apply the understanding to the effect of walking away from the campfire.
Further experimentation Switch the bowls of hot and cold water.
Now the right hand is in the warm water, and the left hand is in the cold. Do the above experiment again. Put your hands in the bowls of hot and cold water for 1-2 minutes. This time, plunge them into the opposite bowl. Don't use the middle bowl of luke warm water.