Demonstrate open- and closed-piped resonance with these colorful tubes. When whacked against the floor or your knee, each tube produces a clear tone. Students can even play songs! Tubes are color-coded and labeled with the musical note they produce. You'll get an 8-tone scale with 4 "Octavator" end caps, which halve the fundamental frequency, moving the tone down one octave.
http://www.arborsci.com/set-of-8-boomwhackers
man, there are no condescending comments for me to scoff at here.
Wallaceofspades 1 month ago