Check out Aliante! This is in an excellent section of North Las Vegas. The schools are highly rated, there are family friendly parks, walking/biking trails, and easy access to shopping and the highway. We relocated about 15 months ago, researching for more than a year as to where we wanted to move. Aliante was our final stop. Bought a beautiful, affordable home in a quiet area. No crazy congestion like I found in other parts of Vegas.
There are many family friendly activities in the community, from movie night at the park during the summer, as well as a fall festival and the winter tree lighting at one of the close parks. Aliante has its own library, a casino that also happens to have a huge movie complex as well as good dining. There is shopping close by, from Costco, Target, Wal-Mart, several grocery store choices. We are very close to the 215 beltway, which is a quick connector to any of the other highways.
I would suggest you find a buyers agent and speak with him/her about your must haves and desires. The idea that you can find what you want in an open house is unlikely, there are very few open houses anymore, and you will need to get a feeling of neighborhoods as opposed to a specific home to narrow down your search. The buyers agent will be instrumental in assisting you narrow down that list and help you to understand the unique Las Vegas market. They can put all your parameters into a search for you and send all the properties that fulfill your desires into your email inbox daily! Good Luck!