Kim:
Blizzard Beach gets my vote.
If your children are under 48", they'll find the shorter slides of Tike's Peak safe and appropriately thrilling for their age. In my opinion this area is superior to the younger set's area at Typhoon Lagoon. If your children are right on the cusp of age 6 and want a little more adventure, they can check out
Ski Patrol Training Camp complete with glacier "steps," rope ladders and other water obstacles. When our son was between 4- and 5-years-old, we started out our day at Tike's Peak to warm up to the preteen area where he was definitely skilled and there were no height requirements, but nevertheless, I wanted to make sure he was safe. Bobbing in the water at Melt-a-Way Bay or racing down the many water slides gives youngsters lots to do at Blizzard Beach.
Since I mentioned the other water park, Typhoon Lagoon, it's wave maker pool sees swells of up to 6-feet, and made this mother a nervous wreck when my children were younger. Even I had a difficult time standing up after some of the waves. So unless your child swims like a fish, it's best to visit this water park when your children are a little older, in my opinion.
Wishing y'all a magical vacation!
Whitney