Carney was best remembered as the host of Uncle Don, a children's radio program produced between 1928 and 1947 and broadcast from WOR in New York.

[4] Except for the small amount of time during the mid-1930s when the show was broadcast nationally from the newly formed Mutual Broadcasting System, Uncle Don aired five, sometimes six, times a week, Monday through Saturday afternoons with occasionally a story or two on Sunday mornings, over WOR in New York.

Carney soon generated possibly the largest audience of any locally produced children's show in broadcasting history.

The reality is that he simply left the program, but a popular urban legend is that Carney was fired after an embarrassing incident at the conclusion of a 1947 broadcast.

According to the legend, after ending his program with his usual "Goodnight, little friends, good night" sign off, Carney thought he was off the air and exclaimed, "There!

Schaefer was best known for his collection of "bloopers" – radio and television mistakes, gaffes, malaprops, spoonerisms, and tongue twisters.