Adventurers needed! Discover the dynamic world of northern Arizona geology through experiments, creating a geologic time scale, investigating plate tectonics and sand dune formations. Search for fossils. Walk into the center of a volcano that exploded long ago during a trip to Red Mountain. No class July 4. Make your child’s summer one to remember with the Museum of Northern Arizona. For children ages 9-13, register online at musnaz.org/discovery.