Rolf Harris, CBE, AM (born 30 March 1930), is an Australian/British musician, singer, composer, painter, and television host and personality.

Harris has been credited with inventing a simple home-made instrument called the wobble board. This discovery was accidentally made in the course of his work when he attempted to dry a freshly painted hardboard with added heat, from hearing the sound made by the board as he shook it by the short edges to cool it off. He suggests the effect can best be obtained through faint bouncing of a tempered hardboard or a thinner MDF board between the palms of one's hands.