Ranger, the time-traveling golden retriever, has landed in Viking age Iceland, where he meets a girl named Helga, who seems perfectly able to take care of herself--until an erupting volcano and an early arriving baby forces Ranger and Helga to journey through the ash and smoke to find her father and bring him home.

Kids find that their imagination starts to grow when they learn about new things and rocks and minerals are a natural aspect of the outdoors but kids tend to not take time to really look closely at each one. Learning about the big and little details of both helps kids imagine where rocks have been, how they got to where they were found and what caused minerals to form and take shape; all of these things help children think in new and exciting ways....