Yeah the KSO will be perfect for that. I had a pair of them for a few years and wore them daily during the summer, I bought that particular model because of my work(river guiding, and fish counting), where i would constantly be going from land to in the water and needed a shoe that was comfortable in both elements. I also used them for play and jumping into water was a big part of that as long as you synch the strap down really tight because if it is loose your foot can want to come out. I took them to Hawaii last summer for a field school and was in and out of the water constantly. They held up really well but after 5 weeks in lava rocks and kiave trees they had finally died. I definitely recommend them, the caveat being they will begin to smell absolutely foul over time, they are machine washable, but will still get extremely smelly.
Gravity is a harsh mistress.