How I Made It: A Trip To Sesame Street With Rosita Can you tell us how to get to Sesame Street? Rosita can! In this installment of our How I Made It series, we visit the friendliest block on television to speak with the first full-time bilingual muppet on Sesame Street: Rosita, la Monstrua de las Cuevas. The fuzzy, turquoise-colored 5-year-old first appeared on the show nearly 30 years ago with muppeteer Carmen Osbahr, who helped create the muppet's bright look and personality. Rosita and Carmen talk about their journeys moving from Mexico to Sesame Street and revisit their greatest adventures after nearly 30 years on the show.