Okay so not strictly my problem but it's worrying my sis so thought I'd put this to all you wise mumsnetters out there. The best way to describe is to give you an example of a recent tantrum. My sis bought my niece a pink digital alarm clock as she had requested 'one with numbers'. When she gave it to her, she took one look and threw this huge tantrum, saying it was wrong etc and ending by throwing the clock out of the bedroom. (I have to say here that I haven't seen any tantrums myself so this is all hearsay, if you like). Sis says that she will always buy something for DN1 if she buys something for DN2 and did this recently with a top. This was received in much the same way. Is this 'normal' behaviour for a girl of this age? Or should sis be concerned?