Most tasks take less than a minute to complete and pay a few pennies. If you do a lot of MTurk, it could add up to at least some fun spending money.
Signing up for the program with your Amazon account is easy; just head to the Mechanical Turk website and click one of the "get started" buttons.
Once you're in, the site will tell you how much you've earned and how many tasks you've accomplished—displaying a long list of "HITs," or "Human Intelligence Tasks."
