Spark helped bring Sesame Street's New York City headquarters to life with this digital portrait gallery of the lovable Muppets characters. Visitors to Sesame's new lobby are greeted by Elmo, Grover and others as motion sensors trigger playful reactions from the Muppets on HD monitors as visitors pass by. Stepping on a mat of Big Bird's feet also activates one of nine 60-second skits where the characters interact with one another. One of the 60-second skits is featured above.