I grew up on Sesame Street. I watched it daily as a toddler. In the mid-70s, it was the show for us kids.
I recently revisited the late-70s Sesame Street episodes that included Eleven Twelve, one of my favourite bits. Sesame Street became common ground for my kids and I, even though I continuously booed Elmo and Zooey when they appeared on the screen and openly complained that Snuffleupagus could now be seen by everyone, not just Big Bird.
My personal favourite memories of Sesame Street include that wonderful Camping in Canada cassette and my very favourite bit of all time, Cookie Monster as Casey McPhee getting that train through.
Happy 40th Birthday, Sesame Street. Thanks to Google for tipping me off.