Research is an important part of what made Sesame Street special. The show’s creators studied children very carefully to understand 【小题1】to best keep them having fun and learning. When the show was first introduced to children, some of its creators were not sure 【小题2】it would last one season. But forty years later, Sesame Street is the longest running children’s television program in the United States.

As part of its fortieth anniversary (周年纪念日) , Sesame Street had a【小题3】 guest on its show. First Lady Michelle Obama showed a group of children and Big Bird how to plant. She explained that the seeds would grow into vegetables, which are healthy and good to eat. She also had a message to the parents who watch the show with their children. She said parents can help their children do things to have healthy lives,【小题4】getting enough exercise.