There's PLENTY to do besides gambling. Google is your friend.
I tend to recommend a few things that often falls below the radar of travel sites and Vegas aficionados:
Stratosphere - Level 107 Lounge:
While the Stratosphere is a bit away from the main part of the strip or downtown, it's still a great place to chill, as the bar/restaurant rotates around affording a great view. And when you're done, be sure to walk up the stairs to the roof. Normally there is a charge to get from the ground to this observation deck - even if you're not planing on going on any rides. However, it's free to get to Level 107, and free to climb the stairs that one extra flight. It's fun to take a few minutes to watch the crazy people on the rides.
I went on it in November 2015 when they were having a Movember promotion. $5 if you have a mustache. My opinion: it was barely worth that price. For most of the ride, the west view is of the back of the Flamingo and Linq hotels. Only the few minutes at the top provides anything significant. And even then, you're looking over the roofs of those hotels. The east view is unobstructed, but you're looking at the low-rent district, if you know what I mean. On the other hand, if you pay extra for one of the spheres that has the open bar, it may be a different story. I don't drink, but I've heard stories that it can be quite worth it.
The Pinball Hall of Fame:
A little over 2 miles east of the strip on Tropicana. While often called a 'museum', it's really a large arcade full of vintage pinball machines. While there are some video games there, most are regular pinball, the type of games that Tommy would love, plus a few that seem to pre-date the silver ball era. And nearly every one is in great working condition. Lots of fun.
Colorado River Bridge:
If you go to Hoover Dam, be sure to also walk the bridge. It tends to be overlooked, or skipped because of the stairs, but it's otherwise a nice walk. There's a parking lot near the bridge and about a hundred steps. There's also a lengthy wheelchair ramp. Once you get up there, and walk across, it's totally worth it.
Hoover Dam Lodge:
On the way back, stop at the Lodge. Formerly the Hacienda Casino, it has slot machines in a variety of rooms, each with a different theme. Interesting to check out, even without playing. The main / lobby area has almost a museum feel with lots of info and exhibits about the dam and how it was built. It complements the dam tour rather well.
Superstitions are silly, childish, irrational rituals, born out of fear of the unknown. But how much does it cost to knock on wood?
Note that the same could be said for Religion. I.E. Religion is nothing more than organized superstition.