Whirly Sound Tubes 30 Inch Pack of 4;

Pack of 4 Whirly Tubes. Swing them to make a variety of sounds. Sounds vary with swinging patterns. From Wikipedia, the free encyclopedia: The whirly tube, also known as a corrugaphone, or bloogle resonator, is an experimental musical instrument which consists of a corrugated (ribbed) plastic tube or hose (hollow flexible cylinder), open at both ends and possibly wider at one end (bell), the thinner of which is rotated in a circle to play. It may be a few feet long and about a few inches wide. The faster the toy is swung the higher the pitch of the note it produces, and it produces discrete notes in the harmonic series. To be played in concert the length of the tube must be trimmed to tune it. It is usually included in the percussion section with sound effects such as chains, clappers, and thunder sheets.