After checking out NuWu down the street, and then driving to the nearby Neon Museum, just to realize their entry was sold out, we happily found ourselves at the Las Vegas Natural History Museum. This place IS AWESOME! $12 entry fee and then it's self-guided as you walk room to room through the exploration of Egyptian treasures (including many King Tut artifacts), marine life, prehistoric life gallery, African rainforests, dinosaur mummies, and a room with a ton of animals from the African Savannah. There's even a bear that you are invited to pet to feel its fur.
Honestly, this was one of the best stops on our trip; fun for everyone! Don't miss the little gift shop near the entrance!