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.

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.

The park is also hosting the separately ticketed Birthday Breakfast Bash featuring Sesame Street characters. It will be held at Seafire Grill at 9 a.m. on Saturdays and Sundays through Feb. 2.