Make the most of what you've been given.
"Suppose you can be trusted with something very little. Then you can also be trusted with something very large."
Luke 16:10a, NIrV
While in the car ask your child, "What is something you would like to be responsible for?" If it is within reason, work on a plan for you child to start that responsibility.
Responsibility is showing you can be trusted with what is expected of you.