Sesame Street’s Elmo turned 3-and-a-half Feb. 3, despite being introduced on the show in 1980. Here’s the reason why his age stays so specifically fixed.

Consider yourself Elmo, celebrating your third birthday... once more. We are beginning to believe that this little red furball has figured out the secret to eternal youth.

Play the USA TODAY Daily Crossword Puzzle. Here are 14 of our favorite tweets from Elmo since his last birthday, whether they're sweet, sassy or sarcastic (only when Rocco the Rock is involved!).

Elmo is turning 3-and-a-half, his age forever and always, since he joined "Sesame Street" in 1980. Of late, he's become a social media sage.

a craft area where birthday cards will be created, photo ops with Elmo, Abby Cadabby, Cookie Monster and others, and the singing of “Happy Birthday” to Elmo at the iconic 123 Sesame Street stoop.