Donald Richard Spencer, is an Australian children's television presenter, singer-songwriter, guitarist and musician. He had a long-running role on Play School on both the Australian version and the United Kingdom version, one of only two presenters to work on both versions. In March 1963 his first single, "Fireball" – the theme tune to a UK TV science fiction series, Fireball XL5 – reached No. 32 on the UK Singles Chart. In 2002 Spencer established the Australian Children's Music Foundation.