Most people don't think of crayons as a life-saving tool, but in certain situations, they can be. For example, if you're ever stuck in a car that's sinking in water, you can use a crayon to write a message on the window that will help rescuers find you.
Crayons can also be used to start a fire in an emergency situation. All you need to do is break the crayon into pieces and then use a lighter to ignite the wick. The crayon will burn for a long time, giving you the heat and light you need to stay warm and signal for help.
So, next time you're reaching for a crayon, remember that it could one day save your life.