At Bridgepoint in Mosman, a tiny girl waits among grown-ups for the lift. She has masses of blonde hair, and a black A4 portfolio in one hand.

There’s an open space in front of her and she edges towards it, glancing up at the faces around her. When she reaches the middle she lifts her arms and starts to spin, the portfolio pulling her round and round.

When the lift arrives, she stops, and looks up at her mum. They crowd aboard.