Have you tried telling her that the behaviour is unacceptable and that she is upsetting the other children and that she will have to spend time in the time out chair if she continues or have you tried telling her if she comes in the next day with out crying she can have a sticker .... She is old enough to understand inappropriate behaviour .... And also able to follow the routine ...play ....snack... Outside time.... Lunch.... Story.... Nap.... Snack.... Home .... Or maybe if she doesn't cry she can help with snack .... You know the child .... Does she respond better to rewards or deterrents ?