H&M All for Children Halloween 2013 Costumes. H&M is shaking up the Halloween scene the season, and has created a complete collection just for kids. The collection will feature a lineup of theme costume ideas surrounding 18th century masquerade ball. Costumes for both boys and girls will feature items such as Marie Antoinette dresses, mermaid costumes, pirate outfits and bat capes, with matching accessories. Wigs shoes and accessories can all be purchased from H&M locations. Hitting stores online Oct 3rd, and retail stores Oct 10th,Twenty-five percent of all sales will support UNICEF’s work in Bangladesh to improve access to quality education for some of the world’s most vulnerable children. Look below to see the items that will be available in the collection.