The mice are actually children, five siblings the Man in the Moon calls Nibble, Brighteyes, Fluff, Puff, and Downy the baby, who come to live in an eccentric house he dubs the Mouse-Trap, in the little village of Nomatterwhat, in the state of Nomatterwhere.
[Spoiler (click to open)]Five Little Mice in a Mouse Trap by The Man in the Moon, with illustrations by Kate Greenaway
The Man in the Moon is also something of a Sandman, taking the children on various dream journeys to China, the North Pole, and the Indian Ocean, where they meet or hear about lively characters with pleasingly funny names like Pun-Chin and Michikee Moo.
The children were often fairly naughty, breaking things and making a mess of their clothes. At one point a mother doll falls on its child and the twins, Fluff and Puff, pronounce it dead. Nibble, the eldest, calls the mother a murderer and hangs her! Furthermore, they all judge this to be only right and proper!
The Man in the Moon uses a giant mirror to look down on all the children below. He has a dog with the unlikely name of Bmfkmgth ('and none of you will be able to pronounce that, except those children who live in Wales').