A girl with long black hair in a single plait, a red top and black long pants is doing circuits at the Dee Why Grand, gliding down the slippery dip and climbing up again.
The mother stands at the ladder and hoists a toddler into the air, like an offering. It’s a dangling lump half the girl’s size and twice as bulky, but she takes it on board with a grin and struggles to the head of the slippery dip. Arranging the child with care, she sits down and they disappear.
The mother waits at the bottom.