Julie the Rockhound Author:Gail Langer Karwoski When Julie finds a shiny quartz crystal, her dad shows her how to dig for minerals--like a "rockhound." Combining clever wordplay with earth science, young readers learn about Earth's most abundant mineral `treasure." The "For Creative Minds" section extends the learning with quartz and mineral fun facts and easy science activities. Ages... more » 5-9.« less