Thank you, "Sesame Street"

I believe all my children grew up watching "Sesame Street" on TV.  I liked Sesame Street.  We also saw our share of Mr. Rogers and Barney.  But the letters in the alphabet have stayed with them in part, I believe, because of years of viewing Sesame Street.  Oh, I guess my reading to them, and 12 plus years of school may have helped a bit, too.

One day, I was pushing one of my younger toddler boys in the stroller.  He looked up into the pretty blue sky and saw something like this:

And the little toddler pointed up and said, "Look, Mom! An 'X' !!"  And so it was!  Only, I really don't remember if this was Nick or Eric.  Any memories of this, boys?