Maria helps Elmo write a story about the letter G, but Elmo has trouble thinking of "G" words. Join the Sesame Street friends as they help him finish the tale! Also in this : Anderson Cooper fills in for Oscar to report on the letter G. Lakers star Kobe Bryant stops by to help Abby explain the word "miniature," and Murray limbers up to learn some gymnastics. Finally, Elmo's World is all about the sky. Brought to you by the number 15 and the letter G.