Kids can also open and examine full-orchestrated MIDI songs, like the theme from Psycho, or Scooby-Doo
If you've got Music Masterworks MIDI composition software, you can use these scary sound effects to make a fun haunted house -- first you create solemn organ chords, and then you insert the wav files of howling and evil laughter.
You can download a 30-day trial on their website.
The lesson plan is very detailed and teaches some basic music theory. And we all know that music can teach math and fractions and such like.
Don't forget to let kids print out their musical score -- it looks really cool and professional.