If you will permit me to be candid with you, I have no idea for you. Because truly such stuff doesn't exist. I don't even fancy the term "quick money". It only leads to disappointment in the end. I don't know the country you're from. But honestly, I don't think $100 is substantial enough to invest. You either need to wait too long to yield real gain or end up yielding very little profit. You could however set a goal for yourself, work harder and save up more. Then think about investing later on.