Sounds like the CR will be perfect for your family. The monorail goes right through the center of the main building - exits onto the fourth floor Concourse with great shops and restaurants - Chef Mickey's and Concourse Steakhouse. Be sure to look for the five legged goat in the mural.
Be sure to check out the 15th floor - California grill has a very nice menu - and the observation decks are a perfect place to view the fireworks and the Castle's Kiss Goodnight, even if you're not eating at the restaurant.
The rooms are very large, fit a family of five very comfortably!
My 3 daughters, ages 5, 11, 13, absolutely loved the arcade in their downtime - it's on the 1st floor right across from the Food N Fun Center Food Court.
The food court has great food for that type of thing - my DH loved the fries & cheeseburger basket. It doesn't have many tables though - not a problem during the slow season when we go, but it could be a concern during prime times, especially now that Shades of Green is renting most of the North Wing.
The main pool has a fun slide - not a whole lot of theming, but two hot tubs. The boat dock rents Water Mice - great fun for the kids! There is also a quiet pool closer to the beach.
The Wing rooms are much less expensive than the tower rooms, but just as nice (We've stayed in both) - just be sure to request a room near the main tower as the hallways toward the lagoon are a long walk from the main building.
Be sure to catch the Electrical Water Pageant- it goes by the Contemporary Beach every night at 9:45 or so - just a little added magic.
As you can tell by my screen name - our family loves the CR - we stayed there on our honeymoon 16 years ago, and still love it!