I recognize, and have always recognized, that I’m kind of a sucker. And someone who’s spent as much time as I have working in advertising really should find herself less entertained by it. But here’s the thing: After spending so much time in recent times insisting to us that what Lego girls really want is pastel-purple bricks, “mini dolls,” and pre-made sets requiring minimal assembly, Lego has made an ad that I really like. Are they doing it to get money out of people? Yes. It’s what’s known in the industry as an “advertisement.” But it’s one that shows a girl playing with Legos the way research indicates girls play with Legos: Taking the world around her and creating a world of her own, using her imagination to see