Mack the Knife

Scarlett was watching Peg + Cat which has an episode called Mack the Fork. So she asked me if that was a song and I told her that Mack the Knife was a song and she asked me to play it. Then the following exchange with my 3.5 year old happened:

Samuel: What’s this song?

Me: Mack the Knife

Samuel: The knife can talk?