"Was this the children’s revolution, and was it being televised?" writes Ethan Gilsdorf. (Courtesy WGBH) Half a century later, I can still sing the address: "Write Zoom. Z, double-O, M. Box 3-5-0.

Add Yahoo as a preferred source to see more of our stories on Google. Here's one of many Zoom 1972 facts you should know: It was on January 9th of that year that a new half-hour educational television ...