How can a 13 year old legally make money one his/her own online?

Okay so I live in a small town, which means please don't say yard work paper route, etc. because I'm not a very social person, I live in Missouri btw, so if you need a copy of Missouri state child labor laws, go here: http://www.labor.mo.gov/DLS/Forms/26-AI.pdf, if you couldn't tell it is in pdf format, Hooray for downloads^_^