Zoe Loves Rocco

S41, E23: Elmo is given the all important task of watching over Rocco, Zoe's pet rock. When Elmo gets distracted, Rocco goes missing! Elmo has to follow the clues to find Rocco and save his friendship with Zoe. Also: The New York Jets' LaDainian Tomlinson helps Elmo explain the word 'celebration.' Brought to you by the letter R and the number 19.