I'm babysitting my friends 3 year old and she's in the room with my one year old, both in cots, and they are keeping each other awake-the 3 yo doesn't seem to realise the 1yo can't talk and so every time the 1yo gurgles or babbles, the 3yo is shouting "what's up? What are you saying?" and obviously waking the 1yo up more. Then the 3yo settles, and the 1yo makes a noise and it starts again. Poor kids will be tired out! What can i do?