I highly recommend this museum for adults and children over about 9 or 10. It's not expensive but discount offers are generally available in a number of places including Groupon and coupon books.
Self-guided, the well-designed exhibits tell the chronological story of atomic testing in Nevada and elsewhere. The exhibit is peppered with videos and includes a multi-sensory simulation of an above ground test.
Be sure to visit the Titus Reading Library, named for Dina Titus, internationally known for her expertise in the history and policies related to nuclear power, weaponry, and waste - as well as her knowledge of the popular lore of "Atomic Culture."
The museum is an affiliate of The Smithsonian Institution.