J.R.
If do not mind a small drive my family loves the Serenghetti Water Park in the Holiday Inn in Owatonna,MN. The Serrenghetti is in a quite area in Owatonna. The nice park of this water park is it is quiet and not over stimulating for young kids. My son and his friends absolutely loved it there. We plan to go back again this spring. For the sport enthusiasts there is a Capellas within walking distance.
The Water Park is not as loud and big as the water park hotel in Brooklyn Park.
We will not be revisting the one in Brooklyn Park. My son was so cold at the Brooklyn Park his lips were blue and he would not play in the water. A huge dissapointment since it was expensive to go there. My son also was overstimulated by the constant noises going signaling that water was going to fall in the little kids section. This park is great for kids over 7 years old but for our little one too stimulating and cold.
Another water park hotel is the Holiday Inn in Otsego,MN 45 minutes northwest near Rodgers and Elk River, MN. We have not been there yet but it looks nice. I have seen it on my way to sisters house. It recently just opened. It is BRAND NEW!
I am not sure if the the water park by the Mall of America is finished yet.
Good Luck with your vacation-
J.