Obviously, we were excited to learn in May that the always-popular Canstruction exhibit at the National Building Museum would be returning to D.C. That time has come — and Flickr user anokarina was kind enough to drop a trio of images from the exhibit into the DCist pool. You can check out some of the more ambitious entries from the contest at the exhibit’s official Facebook page. (Unfortunately not pictured: someone who actually made a Capital Bikeshare bike out of cans.)