I forgot you're going with kids. Check out the Nickelodeon Suites Hotel. It's about 1 mile from WDW. Kids get their own room with bunk beds. There's a waterpark, shows, character meals, huge arcade, scheduled activities, etc. I haven't stayed there, but I've heard a lot of good stuff.
http://www.nickhotel.com/
https://youtube.com/watch?v=Nfc7WJrN000