He often used unusual instruments in his performances: he played the didgeridoo and the stylophone and is credited with the invention of the wobble board.

Harris began his career in music in the 1950s, releasing several songs including "Tie Me Kangaroo Down, Sport" (a Top 10 hit in Australia, the UK, and the US), "Sun Arise", "Jake the Peg", and his recording of "Two Little Boys" (which reached number 1 in the UK).

In 1993, Harris did a cover of the Led Zeppelin song "Stairway to Heaven", featuring didgeridoo and wobble board.

Harris was convicted in England in 2014 of the sexual assault of four underage girls, which effectively ended his career.

As well as his beatboxing, similar to eefing, Harris went on to use an array of unusual instruments in his music, including the didgeridoo (the sound of which was imitated on "Sun Arise" by four double basses), the Jew's harp and, later, the stylophone (for which he also lent his name and likeness for advertising).