Not sure where to post this, so placing it here. Stocks?

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Has anyone ever invested in stocks? Pros/cons, stories, tips, website links, anything would be helpful. We want to put at little as possible in (like maybe $10) just to see how it goes. Husbands 401k is invested in stocks but it's through the company who handles it. Not sure how much we would profit off of $10 or how long it would take, or even how soon we could pull out from the stock....any help would be awesome.