We just checked out the PC Beach Aquatic Park last night while at a softball game. I was VERY impressed. The little kids will love the playground in the middle of a shallow pool. It's a very nice pool area and I can see that it will be a great place to hang out for hours. To be honest, I was very jealous that PCB has such a nice facility and we have - nada!
I still can't believe we don't have a pool for kids to take swimming lessons here. For those on the east end of SoWal, the PC Beach Aquatic Park is a great alternative for lessons. They're only $45 for 8 lessons. We're thinking of taking the kids there for lessons and we're on the West side of SoWal.
Note that the PC Beach Aquatic Pool welcomes everyone, but depending on where you live, the price varies. The prices previously quoted are for non-FL residents. If you're a FL resident it's $5/adult and $3/child (I think it was under 14 and under). There are also memberships available. PCB and Bay Co. residents get a good deal on those.