Courtesy of the National Building Museum

Some 60 years after the Lego Group toy company began producing its “Automatic Binding Bricks,” the little plastic connectable blocks may still stand as the best toys ever. For the exhibition Lego Architecture: Towering Ambition at the National Building Museum in Washington, D.C., Adam Reed Tucker has painstakingly reconstructed 15 world-famous buildings, including Santiago Calatrava’s unbuilt Chicago Spire and SOM’s Burj Khalifa (shown, at 17-1/2 feet), in Lego form. Tucker is one of just 11 Lego Certified Professional builders worldwide. Since when is professional accreditation required to play with toys? Through Sept. 5. •