Needs to make $650?

I'm 12 and I need to make $650 by the end of August. I live in a town where theres really no one, and I cant really set up a bake sale or yeard sale. But I think I will do babysitting! I'm REALLY responsible and I've babysat before. Do you think anyone will hire me? Like people down my street? Is there any other ways I can make money? If I made lots of hemp anklets and sold them at the beach for $3 each, would anyone buy them? Out of a hundred, how many do you think I would sell?