"Sun and Moon" is a 1920 short story by Katherine Mansfield. It was first published in the Athenaeum on 1 October 1920, and later reprinted in Bliss and Other Stories.
The children, Sun and Moon, are hanging around the house while a party is being prepared. They play games, then are sent off to bed. The party wakes them up; their parents find them out of their beds and instead of scolding them, they let them go downstairs for a bite - but Sun starts sobbing because Moon has eaten the nut from the centerpiece (the moment of ruined perfection, a recurring theme in Mansfield's work), and they are sent off to bed again.
