This is the kind of museum you usually find in Manhattan or Washington - it is such a great surprise to find this little treasure tucked away on the far side of the Roosevelt Field shopping mall.
They have small aircraft from years ago, when the area was one of the centers of aviation (thus the name, Cradle of Aviation). Charles Lindbergh took off from the old airstrip here, and they have the sister plane of the Spirit of St. Louis on display.
But perhaps the greatest part of this museum is in the space sections (thanks the Grumman, Long Island played a major role in the space place). In addition to some great little rockets and satellites, they have an actual lunar landing module. Not a replica, but one that was destined to go to the moon before the Apollo program was scrapped.
It's an awesome moment, stepping into the room with the lunar lander.
In addition to the displays, they also have a great IMAX theater in the museum.