IPOD Touch locked out and voice activation is on. it won't let us back in - how do I fix it?

If you mean VoiceOver then

You have the accessibility VoiceOver feature turned on.

Triple click the home button and try going to Settings>General>Accessibility and turn VoiceOver off. You may have to use three fingers to scroll the screen to get there. If problems see the following for how to turn off via iTunes:

iPhone: Configuring accessibility features (including VoiceOver and Zoom)

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