I have only been to Typhoon Lagoon once so the things I'm about to mention may be there too... but I immediately thought Blizzard Beach in response to your question because it has the Ski Patrol Training Camp area for kids, Tike's Peak for littler ones, and the big family raft ride Teamboat Springs.
I agree with other comments - either one would be lots of fun! Plenty to do in both places!
