This place is really cool for children. It has live butterflies and aquatic animal exhibits. It also has a touch pool with a few manta rays, too.
For families with children of all age ranges, this places is pretty cool. It contains indoor trampolines and fitness classes.
Since it's July, I do recommend the Wild Water West Waterpark. It cools everyone off after traveling in the heat and wears out the kids energy for a good night sleep.
For those who enjoy attending church, I highly recommend Cathedral of Saint Joseph.
For those who are old enough, I do recommend the downtown Sioux Falls on Phillips Avenue. Blarney Stone is a favorite as well as the Phillips Avenue Diner.