The event, which featured interactive, eco-friendly experiences designed to raise awareness of environmental issues and encourage sustainability, was hosted by Earth Day Network and the National Air and Space Administration (NASA).
Here is a photographic sampling of some of what those who attended saw and did.
|Just one of several lists of activities|
|Young students learn about climate|
|Waiting to explore our Earth.|
|Jennifer Kennedy and Tony Springer explain atmosphere|
|A peep sacrifices itself for science|
|THree layers of glove protects astronauts in outer space.|
|Washington DC as it looks from satellite photos. Now where is our apartment?|
|The littlest ones made a special eco-friend|
|While NSA supplied budding young scientists with backpacks|