Military families, kids and classrooms filled the Walter E. Washington Convention Center on Friday for the USA Science and Engineering Festival in Washington, D.C., for a sneak peek of the events. Toys and technology filled the space and introduced kids to science, robotics and technology. The expo is free to the public April 26 and 27, and celebrity guests include Bill Nye the Science Guy, scientist Michio Kaku, and Mike Rowe from Dirty Jobs.
Science, tech and toys of the future at DC expo
A waterproof robot shows off its abilities in a pool of water at the USA Science and Engineering Festival on April 25, 2014 in Washington, D.C.