The runaway highlight of our trip to the Great Wolf Lodge was the wave pool. It is much smaller than a traditional wave pool in an outdoor water park. But, I liked that better because it was only 2-3 feet deep (except in the very deep end, which was about 4 feet deep). So, the girls could stand in it and then jump over the waves as they came.
The girls like to stand near the wall so they could grab onto the hand holds when they were floating away.