S.W.
Let me start off by saying that i have a 7 yo girl who went through a similar problem - i personally think that 5-6 (depending on when they go to k-garden) is a HORRIBLE age - we spend so much time telling them that they are "big kids" and they are going to "big kids school" - but then again they aren't quite "big enough" to do a lot of the things that the other kids are doing at school. It was a dotted line - and i personally think that its made even worse if there is a younger sibling in the household/family. My daughter is 7 and we still somewhat deal with that now - i really think that the ages of 5-8/9 are bad - b/c its like an "in between age" for kids - and parents alike - they aren't toddlers yet but they aren't yet preteens either -
i suggest trying to get him involved with activities that healthy for kids of all ages - but that he can only do because he is "big" now - like soccer; baseball; football; karate; swimming; maybe update his room - if you can; allow him special "big guy" privledges adn make big deals out of them (stay up late one night; drink a soda; order own meal at restaraunt etc) Attitude is horrible with my daughter too - but when she starts she gets a warning and then she goes to her room - end of story - and she doesn't come out until she is quiet and respect for several minutes and then when she comes out we talk about it - we still deal with it - but we don't put up with it - make sense?
good luck - email me if you wanna talk: ____@____.com
S. w