When I was 9 years old I stole $50 from my parents to buy a basketball card which I then sold for a little over $400.
Can't beat what I did.
At an AFL practice football match one time in Lavington.
I printed off a whole heap of Mickey Mouse pictures. Signed them, then sold them to kids for $10 a piece saying Mickey Mouse signed it. I raised over $500 and was pretty happy with myself.
The smart thing about that was that if I sold it to them for more, their parents would ask what they need the money for.
I would do it again in a heart beat. This time maybe a Miley Cyrus picture. That seems to be the craze at the moment in young people.