FREE FREE FREE- yes here in Vegas a free attraction! They have mermaids who will swim and blow kisses at their admiring fans. A little princesses dream (of any age). Even when unoccupied by merfolk or divers doing stingray feedings- there is a beautiful site of just fish and coral. They have chairs to sit so you can enjoy it or take a break from gambling. Kids love to follow the fish as they seem to chase after the little hands on the glass. It's a short walk from bass pro (w more to do free there) and next to the mermaid bar. From the bar you can seat where you can sip and watch the time float by.
When you run out of money from the casinos slots I would suggest a few moments to enjoy the show. It's peaceful and beautiful
Also now if you are there later at night I suggest going right outside and taking advantage of the new addition to the lawn area (w light up fountains and a beautifully landscaped garden with lounge chairs to soak up the sun or relax in)