Sesame Street – Worms in Spaaaaaaace! Today, they form the letter Y! Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Sesame Street: Why Do You Love the Letter Y?DateDecember 9, 2011In relation toEntertainmentSesame Street: Letter of the Day Game Show: YDateJune 14, 2013In relation toEntertainmentSesame Street: Fireflies: Letter WDateJuly 27, 2011In relation toEntertainment