"Once upon a time there was a little mouse house. It was like a doll's
house, but not for dolls, for mice." Not proper mice, but a flannel
He-Mouse and She-Mouse with beady eyes and bristle whiskers who stand
quite still, propped on their hind legs in the sitting room. Mary knows
real mice run and scamper, and disappointed with her new gift, she puts
the mouse house away in her room. Meanwhile, down in the basement, a
real mouse named Bonnie has been jostled out of her woefully inadequate
flowerpot home by her older brothers and sisters. Overlooked by her
harried parents and desperate for shelter, Bonnie ventures upstairs and
finds the mouse house. And before too long what was a miniature
make-believe house becomes a marvelously messy home for proper mice who
know how to play, much to everyone's delight.