Soft Kitty

A scene in an episode of Young Sheldon, the prequel series to The Big Bang Theory, depicts the origin of the song.

[8] Versions of the song have been released by Australian children's performer Patsy Biscoe,[9] and by the long-running ABC children's program Play School[10]—a recording sung by Philip Quast and Barbara Frawley was released on the show's 1993 album The Best of Play School,[9][11] which predates The Big Bang Theory and has the lyrics reversed, instead going: "Warm kitty, soft kitty, little ball of fur.

[citation needed] In December 2015, the heirs of Edith Newlin filed a lawsuit against the various companies associated with The Big Bang Theory,[12] claiming that the words and music to the song appeared in the book Songs for the Nursery School published in 1937 by Willis Music Company,[4] based on a poem by Newlin;[2][3] the copyright to the book was renewed in 1964.

[13] The website for Willis Music states: In 1937 we published a book called Songs for the Nursery School and we sold tens of thousands of copies.

In that book on page 27 is 'Warm Kitty'.... Warner Brothers and I worked together to secure the rights for the show The Big Bang Theory and they have been using the song ever since.