Eli and I will likely be going for one of the days; they have a STEAM-POWER kids activity room running from 11-5 Friday/Sat and 10-3 on Sunday I think. There's also Boolean Girl workshops on Friday.
The email I got from NIH:
This Labor Day Weekend, do something really fun in Washington, DC!
Check out Escape Velocity – a major event by the Museum of Science Fiction and NASA
Come celebrate the genre with unique panel topics from hard science to pop culture; over-the-horizon technology; hands-on STEAM activities for kids; and amazing cosplay!
Enjoy this year's film festival featuring “Metropolis” and evening events including “The Rocky Horror Picture Show” merch vendors, astronauts, authors, and so much more!
September 1-3, 2017
For a 20% discount on tickets, use promo code: NIH20
and kids are free!
https://escapevelocity.events/registration-tickets
Both the Museum of Science Fiction and Escape Velocity are nonprofit 501c3 educational organizations.