I had been to the Lone Star Flight Museum when it was in Galveston... and it was pretty good. The staff invited me out to the new location at Ellington Airport, I was a little hesitant to make the drive.
Well, we went anyway... and you need to see the hands on kids activities!
There is an interactive STEM kids room with a lot of things to learn... and it's just as good as the Houston Museum of Natural Science or Children's Museum of Houston (just smaller). For kids over ten, there is also a room for flight simulations. And there are hangers full of planes (many of which still fly)!
The Lone Star Flight Museum is not too far from downtown Houston and is worth the drive. Admission is pretty expensive, so I would consider a membership and going back a few times this year. (You can also buy tickets and put them towards a membership after you tour the museum.)
Check out the pictures below!