KITTY AND HER mother go to the toy store for her very first doll. Which one does Kitty choose? Not the doll that walks and talks. Kitty chooses a rag doll that can't do anything, not even sleep. "But she can pretend cry and pretend sleep . . . and she can say anything I want her to say," says Kitty. And as she walks home with her new doll, she holds it close and pretends that it says, "I love you."