The Wintergreen Resort and Conference Center in the Wisconsin Dells is well suited toward families with young children.
Blizzard Bay, the indoor waterpark area, features a full size pool, a 55 ft. water slide and an ice fort activity area. The outdoor water park area known as Polar Island is a larger water park with a 100 ft. slide, several smaller slides and pools, and two whirlpools.
This is a nice alternative to the large indoor water park resorts if you have smaller children or are looking for relaxation away from the crowds.