"Be" and "Quiet"

[On weekends, the only days we get to "sleep in", Jason usually wakes up early and starts playing with his toys. Sometimes he also wakes up Brianna (by flicking her bedroom light on and off) and then they both start making noise. One morning it was particularly bad, with the kids banging around and yelling at each other while we were still trying to sleep.]

Jack: "I already told them once to be quiet."

Laura: "That's like speaking French to them. They don't understand the words 'be' and 'quiet'."