Flash and lights isn't all Las Vegas has to offer - 30 minutes south of LV, Mustang Helicopters (booked through Viator) gives a wonderful tour to the Grand Canyon.
I balked at the fee, but for a once in a lifetime experience it was absolutely AMAZING.
We kayaked the Colorado river the day before. (Evolution Expeditions offered seamless service.) The water was wonderfully cold for such hot day and it was a great way to see persepectives.
Word to the wise: probably best to avoid doing either activity during the hotter months. Early June and though the experiences were wonderful the sun/heat was intense.