Rapsgaliwn is an S4C programme for pre-school children.
It is shown on the Welsh-language children's television programming strand, Cyw.
Each episode revolves around children asking him a question and he produces a rap with the answer after doing a bit of research.
Despite being a Welsh language programme for Welsh speaking children, English subtitles are usually available with the phrases reworded in order to maintain a rhyming pattern after translation.
This article about a children's television show originating in the United Kingdom is a stub.