Ok my friend found out about this really useful thing, so I want to give some credits to him, but since he don't spend too much time here, Ill post a tutorial on how to get a free mic!
All you basically need is any kind of headphones..
Plug in the headphones where the microphone suppose to go and talk into it easy as that..
It works because the speakers can pick up the vibrations your voice makes, but its hard for it to do that unless you have a lower voice because the speakers normally put out more bass than treble. The mic. has a smaller speaker inside which picks up a full range of sound making it easier to speak.