How to make a DC motor into a wind generator?

I need to make a wind turbine for a science project, i have everything else sorted.

I'm using a DC motor from an old remote controlled car that used a 7.2 volt battery. Is there anything i need to do to this before it can be attached to the spinning shaft of the windmill, or can i hook up the wires to a lightbulb and let the thing spin?
 
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