Kings Park West is a great neighborhood. The first thing that comes to mind when I think of that neighborhood is family friendly. The neighborhood was on our list when we were house hunting.
The Robinson pyramid is very solid for schools; you really can't go wrong. (Also agree with others that Lake Braddock and West Springfirld pyramids are similar and just as great.)
We ultimately bought in a nearby neighborhood, the aforementioned Middleridge, and we're very happy here. (Hello, PP neighbor, whoever you are!

I've never seen so many mentions of our neighborhood in a post. Must be something in the air today.)
Country Club View and Fairfax Club Estates are also wonderful neighborhoods.
Good luck in your search!