BOOMWHACKERS Boomwhackers Tubes Treble Extension Set,Set of 7 Boomwhackers are tuned plastic percussion tubes. Play by (gently!) striking almost anything: a table, the floor, your thigh or hand, a shoe. Different surfaces can produce different qualities of sound (but always the same pitch). Age: 3 years and older This 7-tube Set starts where the C Major Diatonic Set leaves off and contains high C#2 (red-orange); D2 (orange); D#2 (yellow-orange); E2 (yellow); F2 (light green); F#2 (dark green); G2 (aqua)