Fitting room wars no more! When it comes to trying on Halloween costumes, your children don't even have to unsnap their shirts. Pottery Barn Kids has an inventive and free costume finder iPhone app that allows a mom to upload a picture of her kiddo and then see the way he or she looks in different costume options before making a purchase. The technology can come in handy for families who don't want to brave the mall with their big brood or new parents who wonder what their babe will look like in a certain ensemble. If even the thought of trick or treating makes you nostalgic, scan your own childhood photo and slip some virtual costumes on for size.