What is a good job for a college student?

I'm writing a book and this girl named Casey go's to collge. What would be 2 or 3 or how ever many good jobs for a student with not alot of money that could help give them a little bit of $. Anything helps- I love ideas that you think might be wacky.
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Waitress, nursing assisant (since they don't need a lot of training), donating eggs to fertility clinics (people do do this), retail store worker, working at an amusement park, swim instructor....plenty of possibilities.
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A bank job is perfect when you are in College.