hmm..only hard part would be the chain..you could create the whistle from a cylinder, then extrude a face horizontally..a couple of intrusions, and yer there..;) I think I've seen a whistle somewhere, just don't remember where..keep your eyes peeled..more, and better answers following this..

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)