I had a blast on the Screamin' Eagle! They speed up the boat, then stop abruptly, or make a wild turn, so everyone gets splashed! It was really a lot of fun...
I had the center seat on our bench, so I didn't get too wet, but my friends in the ends were complaining about getting salt water in their eyes. I doubt they would put a child at the end of the row.
There was a big locked box for our possessions that one member of the crew stayed with while we were on the water, and they sold a neckband for your eyeglasses for $5 if you thought you needed one.
I'd do it again in a minute!