It's more than just a name on a sign - Sesame Street is a TV show that has made characters like Cookie Monster, Elmo and Big Bird familiar across the world.<br /> <br />It is shown in 140 countries and has taught millions of children their alphabet and how to count. <br /> <br />This week, the show turns 40 years old.<br /> <br />Cath Turner joined the celebrations in New York.
