Your Car is running

Chris needed a new battery in his car and Eli wanted to help him.  Chris decided to have the battery tested first.

The mechanic opened the hood of the car to test the battery.  Chris and Eli were standing right there.

Eli: Can I watch?

Mechanic: Do you have eyes?

Eli: Yes.

Mechanic: then you can watch.

It was determined that the battery needed to be replaced.

Eli: why does your car need a battery?

Chris: to help it run.

Eli: your car can't run, it doesn't have any legs.