The Ticky-Tacky Doll — Cynthia Rylant

The ticky-tacky doll has been one little girl's best friend ever since Grandmama sewed it for her. They do everything together--eat, sleep, play, even dream.
Then school starts, and for the first time the little girl has to leave her beloved companion behind at home. Without the ticky-tacky doll by her side, she grows more sad-eyed and lonely each day.
Luckily, Grandmama knows just what to do. . . .