At one point in time, the Sony Walkman was a game-changing way to listen to music—you could take your tunes with you! The portable cassette player is now totally archaic and a new generation is completely unaware of the thing's existence. 

In a YouTube series called Kids React from the Fine Bros, children respond to the (now) antiquated technology. Spoiler: most are surprised to learn it's a music-playing device and even more are confused that you can't skip songs. 

"You need headphones just to listen to music?" one kid complains about the lack of built-in speakers. "Do you know how messed up that is?" He's got a point.

Watch the clip above.