For more than 50 years, Sesame Street has been the home of a very diverse population. From a childlike red monster, a friendly yellow bird and a green grouch to people of all ages, colors and occupations, the classic TV show makes a concerted effort to depict everyone being treated with compassion and respect. This year, there’s a new neighbor on Sesame Street – Elmo’s friend Karli, a Muppet who is also a foster child.