Avengers Accessories ...The party is not complete until you add Avengers party accessories. Make sure to look at KidsPartyWorld.com's accessories department including Avengers blowouts, stickers, hats as well plastic accessories such as Avengers 16 oz. souvenir cups which make a great birthday party keepsake, and useful party food serving bowls. After the birthday party, consider sending Avengers thank you notes to your entire guest list. No matter what you choose, a Avengers accessories will make a great addition to your birthday party list.