Well if you just need to do this once then you could borrow the money then pay who ever you borrowed it from back later or you could always ask anyone in your neiborhood if you can do any jobs that usually can get you a lot of money.
You can't.....
how can a 12 year old earn 1200 dollars in a school by selling candy
babysit
a ten year old can earn 100 dollars quickly by saving and by asking family relatives to lend you some or doing some chores
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This is impossible. It is hard to do all of that.
A 13 year old can ear $500 by babysitting,cleaning,and yard work. Those are just some simple ways for a 13 year old to earn money:)
Do chores.
How fast is fast? Is it 1 day, week, month, or year? The fastest (legal) way is to borrow it from an individual or institution.
Sell some of your stuff on craigslist.
Yes, just do chores a lot.
i usally help my parents pick up the house or do some chores