How can I make 125$ within the next 20 days?

I need legitimate answers.

Here is my situation:

I want a PSP, either that or I'm stuck with DS.

I only have about 150$ im guessing by the time my birthday ends, its either 150, or 175.

So, im just gonna go for the worst case scenerio, and say that I have only 100$(i have that right now)...

So, Now, I have 100$, and i have 20 days to make about 75-125$. What can I do, to make that?

It is almost spring, it is VERRY WINDY outside, has been for a week, and it's pretty cold. Not snowy, the sun is kinda warm at some points int he day, but its always windy. It doesnt look like anyone's grass needs cutting, since most of its dead anyways, and i dont want answers like " Get a job" (Im 13), or " Give head" (I'm not fucking dumb).

Give me resonable answers. Please!