The mind of a 9 year old....

Lately I've been trying to deal with some issues that my youngest son seems to have developed.
He's more mature for his age, thinks more about the burdens of life as a child as opposed to just enjoying.

He is hyper, I believe I have mentioned it before. When he plays he forgets, but when he stops playing all manner of 'worries' seem to creep into his head- mostly the stuff that he does not like to do. And those things seem to weigh down on him. He uses the word 'stress' easily when he actually means he is angry at being forced to do them - simple things like doing some written work particularly the 2nd language, his brother's put down, curbing his play time or has unfinished homework that worries..
Boredom builds fast for him so he constantly needs to be occupied but within the occupation he soon looses interest too. It's hard to keep his mind on a non-action subject for long.

So one I've been giving him examples of more stressful possibilities that have/ could have occurred in our lives to define what stress really could be (he understands that better than most [glad he seems to have forgotten];and two, I have also been trying to get him to understand that he needs to mend his attitude otherwise he's not going to be able to cope with what he calls life and will always have this problem because others are not giving him his freedom. His expectations seem more complicated for a child.

I have to keep at it for it to work. ................       .so many little things to keep at ...

How do you explain what the job of a kid is to a kid?