Thursday morning was, Paul Siefken said, “certainly a beautiful day in this neighborhood.”Siefken, president and CEO of Fred Rogers Productions — the same nonprofit production company founded by Rogers himself more than 50 years ago. Rogers, of course — a writer, composer, musician, actor, singer, puppeteer, early childhood expert, Siefken rattled off — was the creator of “Mister Rogers’ Neighborhood,” the PBS show that, for more than 30 years and 900 episodes, “inspired you...
