Here's an overview of eight year old's emotional development here's the link where I copied it from
http://childparenting.about.com/cs/childdevelopment/a/eig...
Hope this helps:
"Eight year old children have emotions which are expressed openly. Anger is a prominent iotion. He may blow up at his mother, friends, and especially siblings. He is very dramatic in his verbal expression, saying This alwayshappens to me, or I neverget to do what I want. Rude and obnoxious are two descriptive terms that are frequently applied to eight-year olds. He thinks he knows more than he really does, and comes off as a know it all. He likes to argue and is critical of others, especially his mother. Eight is also impatient and wants to do things immediately. He can't stand to wait for special events such as birthdays, Christmas, and family vacations. Involving him in preparations and planning helps him cope with the torture of waiting for these special days.
Eight year olds are very attention-seeking and will follow mom around constantly.
She is constantly in and out of the house, starting activities then abandoning them Emtions shift as frequently as her activites, so usually she can be calmed quickly when upset. On the other hand, she can go from calm to furious in the blink of a shocked parent's eye.
All of these negative behaviors are eight's way of coping with his development and asserting himself into his world. If you can look past these difficult qualities to the courage and openness of your eight year old, you can avoid panic and stay hopeful. Guidance and planning for good behavior is the best strategy of a patient parent of an eight year old."