How does dad try to take the family's mind off of the cold and why doesnt his plan work- the watsons go to burmingham?

Dad tries to take the family's mind off the cold by suggesting they listen to music and sing along in the car. However, the plan doesn't work because Kenny, the youngest son, is too startled by the cold weather to participate in the singing. Instead, Kenny is distracted by the idea of his lips freezing to the car window.