Elmo's grandparents, known simply to Elmo as "Grandpa" and "Grandma," have appeared in illustrated storybooks and in a 2014 episode of Sesame Street. They live on a farm and Elmo and his sister Daisy visited them in the 1990 Sesame Street book Elmo Gets Homesick. The couple returned the favor 18 years later, visiting Sesame Street in the 2008 book What's the Word on the Street? In 2014, Elmo's grandparents made their first on-screen appearance as Muppets. In episode 4417, Elmo's Grandpa and Grandma participated in a video-chat with Elmo and his friends on Sesame Street.