Cookie Monster might be in over his head as he co-hosts the show and babysits his baby niece, who also has an insatiable appetite for that special, crumbly round treat...and Elmo's talk show set. While Cookie Monster chases after his niece, Miles Brown visits with Elmo, raps his own nursery rhyme, and shows off some very impressive basketball moves. The Joyous String Ensemble stops by to play a medley of Sesame Street favorites.