Tank G.
Yelp
This are two Air and Space Museums in the area. One is located downtown and this one by Dulles airport. This museum has a huge parking lot that costs $15 before 4PM and is free after that. Also, the first 30 minutes are free for drop offs and pick ups.
Admission to the museum is free and they do not require a time ticket. You will see the giant stainless steel sculpture, Ascent, towering in the parking lot. It is definitely worth a closer look.
The museum features many attractions. Some notable ones include a flight observation deck, that you have to take a short elevator ride to get to (you can hear and see actual radio traffic from neighboring Dulles Airport), an IMAX movie theater, flight simulators (additional charge), and green screen souvenir photos.
They also offer guided tours of the museum that are scheduled, but I oped to go at my own pace. The museum is huge and has over 100 aircraft, but its featured aircraft are the Space Shuttle Discovery, a Blackbird SR-71.
You will find other various aircraft including a Concord, rockets, missiles, bi-planes, bicycle planes, a Boeing B-29 Superfortress, a F-14 Tomcat for the Top Gun fans, bombers, private jets, crop dusters, blimps, ballons, aircraft mounted weapons, different space suits, a Coast Guard HU-16 Albatross, and the suit that they guy that jumped from spaced used.
There is a lot to see at this museum. In addition to all the aircraft, they have Discovery Stations scattered about the museum that teaches you different things and has displays like astronaut clothing, astronaut food, the effect of space of the body, and other subjects.
If you go up the stairs behind the Space Shuttle you will find windows that look out over the museum's restoration hangar where they reconstruct, repair and maintain the museums exhibits.
Every Tuesdays and Thursdays, at 10:30 am and 11:00 am, they hold what they call On-Site Drop In Story Time, where one of their museum educators reads a story to little ones.
There are 3 different simulators to choose from: Ride Simulators, Interactive Flight Simulators and VR Transporter Experience. The cost of these experiences vary, as well as the height requirements. My littles were only big enough to Ride Simulator. I did not find it a very fun ride, but my little kind of enjoyed it.
We spent about 2 hours here, and if we did not have plans, we could have spent at least two more. I really, really liked this museum. It is well organized, has an educational component, lots to see, and a amazing and friendly staff. Oh, and did I mention....It is free. I highly recommend checking this gem out. I know it is well off of the beaten path and will take some logistical planning if you are downtown, but it is so worth it.