There's a hilarious YouTube series called "Kids React" where the filmmaker basically puts kids in the room with old stuff to get their impressions. In this episode they let kids loose on an original Sony Walkman.
I think the facial expressions in the clip explain it all. Loved the "my grandpa had these" comment about the headphones too. (Shouldn't kids know about headphones? Dr. Dre's Beats are pretty hot these days.) The kids reacting to rotary phones episode is also hilarious so go browse their channel for more nostalgic fun.