Elmo, Chris, and their friends on Sesame Street have dressed up as dinosaurs. With help from Elmo's book, they learn that there are small and big dinosaurs, some dinosaurs are herbivores and some are carnivores and that Big Bird is a dinosaur!

Elmo helps Abby, Grover, and Telly figure out how to say thank you to our nose, eyes, and mouth all at the same time.