Add Yahoo as a preferred source to see more of our stories on Google. This dream team-up is the first of a trio of videos created by Ms. Rachel and Sesame Street. The video goes on to show what a full ...

At first glance, it might have looked like a run-of-the-mill social media check-in: "How is everybody doing?" But the message came from Elmo — the furry red friend to kids, Muppets and anyone else.

What began as a simple check-in from Elmo turned into a viral moment that's becoming something fans can revisit again and again.