My girls (7 and 9) LOVED this park as much as my DH and I did. There was a slide/play area that my girls were too old for - meaning they weren't even allowed in. There were also two little slides near the wave pool that were perfect for younger kids. I thought this was really nice and I've read good things about it. Some of the tube slides are tame enough for a young child and there is a family tube slide. My girls never capsized once upon landing, but I know this is possible. Your child can wear a life vest (available for free for the day) and there are lifeguards within a few feet of the landing on slides.
The park is quite shady which is nice when standing in line. I have heard that BB is not as shady. Just have your child wear water shoes!!! There is lots of sand near the wave pool - fun!