We went on the jet boat ride and cannot recommend it highly enough.
The price was a very reasonable $99 for a family of 4. And we all enjoyed every minute.
You start from Tin City and slowly make your way out of the bay taking in the sites. Then the fun begins cutting through the sea at high speed, bouncing around and getting drenched when the captain does a 360 degree spin. Better than a theme park ride, and you get to see wildlife as well.