Checkup

On the drive to school this morning:

S: Grandma's going to pick you up today. Grandpa's got to go to Buffalo.
H: What's Grandpa doing in Buffalo?
S: He has to run some errands and take the car for repair.
H: What's "car repair"?
S: Repair means "fix." Actually, he just needs to get it checked out. Cars need checkups just like people.
H: But...cars don't have hearts!
S: True, but they have engines.
H: Well, that's silly.