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They're wild! They're "whacky!" They're wonderful! They're your ticket to non-stop fun! Boomwhackers Tuned Percussion Tubes are brightly colored plastic tubes that are tuned by length to musical notes. Affordably prices, easy to play and lots of fun! Use the Octavator Tube Caps to drop the tone of a tube by an octave, creating a possible 3-octave range. Everyone can play them - and kids think they're a blast! Whack just about anything - and boom! You're making music! C Major Pentatonic Scale: contains 6 notes: C',D',E',G',A'C" C Major Diatonic Scale: Consists of 8 notes: C'-C" Chromatics Set: consists of 5 sharps/flats for the standard octave. Creates a full octave of 12 notes. C Major Bass Diatonic Scale: 7 notes, C-B. Combined with the standard Diatonic Scale set to create two full diatonic octaves. Bass Chromatics Set: Consists of the 5 sharp/flats for the bass octave.