Introduction: PVC Air Horn to Scare Your Friends (or Cats)

Build a home made air horn out of PVC pipe.  This air horn is very loud (but not deafening) so you can use it to scare the trick-or-treaters when they come to your door!  Combine this with last week's floor switch project to make it automatically go off when someone steps on the switch!

Halloween Decorations Contest

Participated in the
Halloween Decorations Contest