Filene's is right next door to H&M. If you've never been to either store... let yourself have PLENTY of time. H&M has cute kids clothes with Old Navy prices. They also have adult, but depending on your style, you may or may not like it. They don't sell anything online, which is disappointing, but I bought my dd3 about $300 worth of clothes when I was there in August. We don't have one in Atlanta, but I have my fingers crossed. There's a Filene's here that I've been meaning to go to.
Oh, and I know Filene's is pretty big, but H&M is three stories tall.