As the mother of a "tween" I was having trouble grappling with all these mood changes and how to describe them and put them into words.  Luckily I found a blogger dealing with the same and was able to put these mood changes in writing....perfectly.   Those with tween girls READ THIS!   Those with girls approaching the tween years take a peek to see what you have to look forward to.   LOL

http:/www.scarymommy.com/multiple-personalities