There are many on line resources for rocks and minerals education other than books from the bookstore (which is great for parents to share with their youngest ones). Below are a few links that are popular and can also provide further links to help you find answers to satisfy the young rock and mineral enthusiast (or even the young at heart). Below is a curated list to get you started on your learning journey!
The Smithsonian website has a very fascinating collection of webcasts and a great distance learning resource for kids on the subjects of earth sciences and paleontology. Please explore these links and more.
One of the best on line resources for geology and up to date geology news with a reference section to teacher resources Geology.com
American Federation of Mineralogical Societies has a kids resource page for learning and with links to other nice resources
For the subject of Fossils and dinosaurs try the American Museum of Natural History site kids – paleontology
From the library of congress website – big and vast online resources guide to Dinosaurs and Paleontology super resourse guide for older kids & teachers