He built the original Kermit using one of his mother’s coats and a pingpong ball cut in half. The puppet gained fame through appearances on “Sesame Street” and also “The Muppet Show.” ...

which introduces various Kermit the Frog segments from Sesame Street, while being interrupted by the Three Little Pigs, who are there because Kermit introduced them twice on Sesame Street News.

But that all changed with Season 11, when Maria found him polishing a statue of the letter H ... character of The Muppet Show, Kermit the Frog debuted on Sesame Street as an original cast member.