This Baby Elmo Costume makes your little one the cutest one on Sesame Street! How adorable will your little one look on his first trick-or-treating trip wearing this baby costume? The answer is “very,” and you should get this infant Elmo costume ASAP. The bib and hat that come included in this Sesame Street costume work together to make your little guy the cutest one at Halloween! Availability: The Baby Elmo Costume ships in approximately 1 business day.