White Water Park is a great way to spend a day in Branson. We always go here every year. There are lots of water slides, a lazy river, and a wave pool. There are also separate areas for toddlers and young children. Adults are allowed to ride on any ride with the kids. White Water supplies life jackets but be sure to bring along a towel. Arrive early at the park because that's the best time to ride the slides. There are no lines when the park first opens at 9am.
A good place to set up camp for the day is at the wave pool. If you do not like sun there are shaded areas that have plenty of chairs. There is a separate picnic area where you can bring your own picnic lunch or you can purchase food from the food vendors. The prices are reasonable for food. The lifeguards are trained well and I felt very comfortable letting our children go from slide to slide without my constant supervision.
I suggest you rent a locker for a day for $5. Then you get a couple dollars back for returning the key. This is a wonderful way to lock up valuables while you ride the slides.