Henbrandt Fart Whistle Classic Party Joke Prank Gag Novelty Trick Game Noise Kids Party Bag Filler Fart Whistle Classic Party Joke Prank Gag Novelty Trick Game Noise Kids Party Bag Filler There&#039;s no point denying it: from childhood onwards, farts are funny! Human ingenuity has produced numerous ways to replicate the characteristic sound and one method is the Fart Whistle. Small enough to be hidden in a pocket and then stealthily produced when the occasion calls for it. Approx 11cm