Riley Palmer, a second grader at City and Country, said that creating a series of Brooklyn Bridges, each about three feet tall, helped her class understand what it had been like for the original builders. “There is so much you can do with blocks,” Riley said. “You can stagger them. You can stack them. It’s fun and cool. And when we’re done, we’re going to be able to show everybody in school what we did.”

With Building Blocks, Educators Going Back to Basics – NYTimes.com

Constructionism (no pun intended) exemplified.