If you and the kids thought the “Towering Ambition” Lego exhibit at the National Building Museum was cool (or maybe you haven’t seen it, but still really like Legos), then check this out: BrickFair, the nation’s largest Lego Fan Festival, is happening this weekend, August 7-8, at the Dulles Expo & Conference Center. From 11am – 4pm both days, guests can behold some amazing Lego creations constructed by Lego enthusiasts from around the world. Admission is $10/adult, $7/children.