Just as an example, I'll go over your first paragraph, ok? I'm only fixing the grammer, nothing else, not touching the way you tell the story.
Yours:
Once upon a time, there was a large moutainside, where an eagle's nest was rested. The eagle's nest countained four large eagle eggs. And one day, an earth quake shaked the mountainside and one of the eggs fell down the cliff, to a chicken farm. (45 words)
My revision:
Once upon a time there was a large mountain where an eagle's nest rested. The nest contained four large eggs. One day, an earthquake shook the mountain, and one of the eggs fell down the cliff to a chicken farm. (40 words)
You will notice that I have removed some words that did not need to be there (NEVER use more words than you NEED). Check which ones, and ask yourself why. I have corrected the tense and form of 'shaked' (incorrect) to make it 'shook' (correct), and the spelling of 'countained' (which may have been a typo!) to 'contained', and have altered 'mountainside' to 'mountain' simply because it sounds better, not because 'mountainside' is incorrect. Oh, and notice where I have altered punctuation.
Hope that helps!
Do you do much reading?
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[This message has been edited by Fljotsdale (edited 09-23-2001).]