Tin whistle all the holes closed, the whistle generates its lowest note, the tonic of a major scale. Successively opening holes from the bottom upward produces the rest of the notes of the scale in sequence: with the lowest hole open it generates the second, with the lowest two holes open, it produces the third and so on. With all six holes open, it produces the seventh. As with a number of woodwind instruments, the tin whistle's second and higher registers are achieved by increasing the air velocity into the ducted flue windway. On a transverse flute this is generally done by
Toot, Whistle, Plunk and Boom cavegirl on the head with his club, and drags her off by the hair (which makes Caveman Whistle angry). Professor Owl explains that this system of holes is the basis for every woodwind instrument, including the clarinet played by Johann Sebastian Bach and the saxophone played by a beatnik. Caveman Plunk has discovered that plucking on the string of his bow produces a pleasant "plunk" sound. An offscreen choir explains (as the animation shows) how to create a simple harp from Caveman Plunk's bow by adding a jar to make a resonator, adding some extra strings, changing the jar to