backseat driver

the kid: speed limit 40. daddy, how fast are you going?
the hubby: 38.
the kid: good job, daddy. don't drive too fast. if you start going 40, slow down a little bit so a police officer doesn't have to come and give you a ticket. 
the hubby: thank you, mr. backseat driver.
the kid: you're welcome. I like helping you, daddy.