laura travelyan reports. the recording of sesame street is a serious business. the mission is the same: learning through play. l-o-v-e. what that say? love! the creators of sesame street, back in 1969, had a radical idea: using puppets and humour to engage parents watching tv with their kids, to make the learning experience deeper. it started, really, as an experiment. sesame street was created to see if less advantaged children could benefit from early education through media, to arrive at school ready to learn. and of course, it was an overnight success. like millions of others, i grew up watching sesame street, and so did my kids. so meeting elmo and abby was quite the moment. now, i know that you two are very good with your words. elmo, what's your favourite word? supercalifragilisticexpialidocious! i like that one, too! that's a good one! abby, do you have a favourite word? yes, it'sjoy! that's good! i'm going to be an artist when i grow up. sesame street has always embraced diversity, which has led to controversy over the years. mississippi's education boa