I think that novelty number was doing the rounds at the time ... around my 14th birthday (September 1959) I went to Taronga Zoo, in Sydney ... and there was this bearded bloke singing in the kangaroo pen (and wobbling a sheet of 'Masonite')! It was Rolf Harris promoting his new single: 'A' side - Tie Me Kangaroo Down, Sport and 'B' side - Nick O'Tine & Al K. Hol (Spelling not guaranteed, I never bought the record ... although I did get an autographed "wobble board"!)