Introduced in 2006, Abby Cadabby has quickly become one of Sesame Sreet's most popular muppets. Abby Cadabby is a fairy in training, and at just 3 years old, children relate to her instantly. Check out our selection of Abby Cadabby costumes for Halloween or dress up, as well as her magic wand. What does Abby Cadabby say? "That's so magic!"