What do you say?

One of the ways we trained Sempi to say “Please” and “Thank you” is by asking him “What do you say?” after he receives a favor from someone. With that context in mind, this conversation happened in the car. 

Vian: Can I have that monster truck, Sempi?

Sempi: Here you go. 

Vian takes the truck. Sempi being the responsible older brother wants to teach Vian good manners. 

Sempi: What do you say, Vian? 

Vian: Vrooom, Vrooom.

Sempi just shakes his head and mumbles something that vaguely sounds like “Kids these days”.