All you need is Word, the sound effects you can download here, and the downloadable lesson plan:

Download this zipped file of halloween sound effects:: scarysounds

And download this lesson plan: lessonplan

Get your kids' imagination going by using both pictures and sound effects -- this method uses the windows Sound Recorder -- kids can edit the sound effects a bit -- reverse the sound clip to make it sound like an alien.

Obviously, you'll need speakers or headphones to get the full effect.