Star Wars Episode 3 Child’s Darth Vader Costume. Whether for Halloween, dress up parties, school projects, or just for fun, children have always loved to dress up! Rubie’s Costume is happy to provide children with hundreds of costume choices – whether you’re looking for a classic or modern version of a witch, monster, or ghost, a princess dress, historical figure, or their favorite character from movies or television. Costumes are not the same as apparel, please be sure to check sizing information provided by Rubie’s to help ensure you get the right size the first time. Rubie’s Costume is family owned, family run, and based in Long Island, New York.