How old are you? It would help to know, but my gut reaction is 'listen to your mother' She has had more experience of dealing with annoying children than you have. The little devil of 3 is getting her reward from your reaction. The more you react, the more she enjoys annoying you and the more she'll do it. So try to ignore her, however annoying she gets. Eventually, she'll lose interest. She's only three , simple things entertain her, and she just loves getting attention (which you are giving her!)