By squeezing the big, red, rubber bulb outside, air is forced through a hole in the wall to flutter a blade on a string so that its knocker strikes the pipe bells to alert the inhabitants that someone is at the door.-- FarmerJohn, Apr 24 2003 How about a tube: "Blow HARD here to activate windchimes".(Secretly though, your windchimes are electronically activated - the tube is a cunning way to breathalyse your guests)<obligatory "Oh, sorry I didn't know you were at the door - I'm using Hippo's Silent Dodgy Chimes">-- hippo, Apr 24 2003 oh nice. I love wind chimes even hippo's-- po, Apr 24 2003 I hear you.-- FarmerJohn, Apr 24 2003 Even a cat could operate this. Can I come in pleese, its cold out here.-- The Kat, Apr 24 2003 ++Good. We've seen some good 'baking in the kitchen in the last 24 hours or so, haven't we?-- thumbwax, Apr 24 2003 Yep. Like it.-- galukalock, Apr 24 2003 random, halfbakery