Jerry Mathers sings his 1966 record as Beaver, 1987

Jerry Mathers, who at 18 years old sang a song called Happiness Is on a record that he wrote with Richard Correll (Beaver's friend Richard Rickover on Leave it to Beaver), sang the song 21 years later on a 1987 episode of the revival series The New Leave it to Beaver. Both versions are edited together here.