Watch Billie Eilish & Finneas Write a Hilarious ‘Hit Song’ With a Class of First Graders

Billie Eilish and Finneas may be a Grammy-winning musical duo, but can they bring those talents to the classroom?

Julian Shapiro-Barnum sets out to find out in a new episode of his Celebrity Substitute series released on Thursday (Dec. 19), where the siblings drop by a first grade class at Garvanza Elementary School in Los Angeles. On the lesson plan is to teach the kids songwriting basics, write a hit song and perform it for their teacher, Ms. Fowler.

“Am I dreaming right now?” one of the kids exclaims when Billie and Finneas enters the classroom, and the fun begins as they attempt to decide what they want to write a song about. The students floated a number of ideas including something “freaky,” ghosts and Kendrick Lamar, before ultimately landing on the topic of snow, and more specifically, polar bears.

They choose to write about “heartbroken polar bear” and end up creating a hilarious song called “I’m Just a Polar Bear,” a mid-tempo pop hit about an insecure bear, reminiscent of Ryan Gosling’s Barbie hit, “I’m Just Ken.”

The class then successfully performs the song for Ms. Fowler, belting the lyrics with Eilish: “I’m just a polar bear/ But nobody cares/ It’s just not fair/ But I’m just a polar bear/ But I made a friend/ With a snowman/ And it’s not the end/ And I’m on the mend

Watch Billie Eilish and Finneas’ full episode of Celebrity Substitute below.