That's one reason why you would be wise not to act too concerned about every little failure. Little girls sometimes go through a stage of wanting to stand up to urinate. Girls generally give up standing fairly soon. It just doesn't work very well and it doesn't feel good to have wet legs. Then it will become a natural habit, one that will help prevent bladder infections in the future.
Some children tell their mother after they have wet.
This is not a sign that they are being hard to get along with. It's just that they can notice wet pants. But they have not quite learned what a full bladder feels like. It's actually a good sign because the child is trying to cooperate. He will soon learn what a full bladder feels like.