writing projects for January UPDATED

I plan to write at least one, but preferably two short stories by the end of January.

The first I am working on right now is a story set in the last days of the 2nd world war. The idea was given by someone I know at the writers' course I attend in town.

He was 2 at the time the war reached his village.

I am writing his story, or rather, the story told by his older brother, the one who was 6 at the time of the events.

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It is not really and outstandingly difficult to see the world with the eye of a 6 yo boy, as my son (who has just turned 17 this December) once was 6, too.

I am a bit confused, though.

Am I to write the story to be read to kids? Is this a story to be read by adults? UPDATE: I definitely think it's the latter.

I have to use the voice of a 6 yo to entertain adults.

Hm...

Any suggestions?

There is a massive plot, with things going on, it's the voice that is crucial I guess.

I am opting for a first person singular point of view character. That is, I am telling the story as if it was told by the kid himself.

Any opinions?

Thank you!
UPDATE:
I finished the first draft and so far, two test-readers (betas) have read it. One of them said the voice was too mature for a 6 yo, the other one said my protagonist looked/felt younger than a 6 yo.
Go figure.
:)
(there will be more betas in the future, for I am planning to introduce the story in a competition.)
As you surely know 2014 is the 100 year anniversary for World War I., and in Hungary alone there are at least 3 or 4 war-themed contests going on right now.