1. Four first ladies have visited "Sesame Street": Barbara Bush, Hillary Clinton, Laura Bush and Michelle Obama.

2. Although Big Bird is a curious 6-year old and Oscar is a Grouch, the two are identical on the inside. At age 75, Carroll Spinney has been both characters since 1969.

3. Snuffleupagus is a pachyderm who lives on Sesame Street. While it is thought that he was invisible, he has always lived on Sesame Street - he just has inconvenient timing.

4. A birdseed milkshake at Hooper's Store cost 20 cents in 1969 and costs $2.99 now.

5. Why the name "Sesame Street"? After a long search for a catchy name, one of the show's writers suggested "Sesame Street." The word "sesame," an allusion to the fabled command from The Arabian Nights, "Open, Sesame!" suggested excitement and adventure. Since the show was set in an urban street scene, "Sesame Street" seemed an ideal combination.

6. It takes two puppeteers to manipulate Ernie, Rosita, The Count, Cookie Monster, Oscar the Grouch, Telly Monster and Snuffleupagus, while Big Bird, who is 8-feet-2-inches tall, only requires one.

- Source: Sesame Workshop