Apparently the music boxes on the ice cream trucks are distinctive.
More than the mediocre ice cream, it’s probably the music that helped imprint these trucks in the broad American culture. My dad once said that one thing you’ll never forget in old age is the handful of top radio hits when you were a teenager. The same is true of ice cream truck tunes, along with childhood advertising jingles. If you want to take a deep dive or find a tune from your own childhood, there’s even a YouTube playlist of 43 ice cream truck jingles.
I'm not going to comment on the "mediocre" ice cream, the offerings around here tending to run to the frozen products, such as the bomb pops and Dreamsicles.
One of the vendors in the neighborhood does the music differently, with a collection of Christmas tunes, both sacred and secular. Well, when the truck hits Knolls Street, it is "joy to the world" for children of all ages.