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.

The lovable fuzzy "Sesame Street" Muppet celebrates in a big way ... Here are 14 of our favorite tweets from Elmo since his last birthday, whether they're sweet, sassy or sarcastic (only when ...