How to get $700 fast?

I need $700 for a new SLR camera, I'm trying to decide between the Canon EOS Rebel T3 and the Nikon D3100, opinions or ideas?

BUT, that is not the point of this question. How do I make $700 fast? I'm 13, I can't get a real job. I have no one to babysit for nor any dogs to walk. I can't make a lemonade stand, too cold nor can I shovel snow as there's no snow… I can't have a yard sale either. Ideas?

BUT, my mom said she will double whatever I get, so I only need to get $350:)

Serious answers only… Thanks.

Added (1). @Ryan, I have made around $500, from doing the above, but I can't do that anymore, so what do I do?

Do a car wash or sell lemonade

Unless your parents are willing to give you the money… It will be near impossible for a 13 year old kid to come up with $700 (or even $350) "fast" and legal without a real job. If money was that easy to get, people would not work as hard as they do.

Since you need the money for a really nice camera, I would imagine you might have some older items lying around your house. Have your parents help you sell them on craigslist or ebay. Do you have old toys that you would be willing to sell?

You could also collect aluminum cans and recycle them for cash. Start with neighbors and ask if they would be willing to let you collect cans. It can really add up quickly.

House cleaning for friends/family members. I'll pay you $20 to come wash my windows! (Not really. You're 13. That wouldn't be right since I don't know you! But you get the idea).

Pick up change on the ground. Doesn't add up fast, but when you're desperate for money, any amount will do!

Try to make things with your friends to sell. Decorate some picture frames, make some bracelets or necklaces, or a slide show for a birthday present.