This is great! Sesame Street has a new puppet named Julia who has autism. The puppeteer who plays her says has a child with autism, and has always wanted to have a character on the show for kids with autism. The show's creative team has worked closely with autism organizations, educators, and families to decide the best way to portray a child with autism, including how to explain autism at a pre-school level. Julia will make her debut in April.
If you want to learn more about Julia, you can check out this story about the muppet from 60 Minutes.