House of Bricks

We were walking back home from the swimming pool in our housing estate, and we passed a house which is being built. 

Steward : "Mummy, why are they building houses from bricks?"
Mummy : "Bricks and stones are one of the most important things to build a building."
Steward : "No..."

Mummy : "What do you mean?" (trying to guess where is the conversation going)

Steward : "I know! So the wolf cannot blow the house down!"

(Steward - 4,5 years old)