Both parks have special areas for children Here is the official Disney description of the Blizzard Beach area called Tikes peak:
Little kids are invited to have mountains of fun in this water play area. The youngest Blizzard Beach goers can slide, splash and swim while sunning in the "snow" in this spot reserved just for them. Gentle body slides, an inner tube slide, interactive fountains, pop jets and a wading pool ensure a chillin' good time.
Heres the Typhoon Lagoon Area called Ketchakiddee Creek:
Romp on sloshy slides, fun-filled fountains, watery whales, slippery seals, an interactive lushly leaking tugboat and a mini ripply-rapids ride. Little squirts love the adventures that are just their size in this children's water play area. It's a little wateropolis of splashy fun!
Both Areas are recommended for Preschoolers but they may be perfect for your kids, and, Dzorn is right. kids do love the wave pool at Typhoon Lagoon.
I myself prefer the kids area at Blizzard beach. They seem to have a few more activities but the children at both these areas can be very young
