What is great about girl Halloween costumes for little girls is that you probably have what you need at home to make up something they are going to love. In fact, they may play dress up a lot and have something they are going to insist that they wear when Halloween comes. A lot of little girls have been flower girls in weddings, and they get to keep their gowns. These can be great foundations for some interesting and fun girl Halloween costumes. You can get accessories that they are going to love if you do a little shopping around and they can be anything they wish.