Rocks: Pictures and Information - This is the Geology.com site which contains most of the information you may need for the flip book.
Rock and the Rock Cycle - This is a Windows to the Universe page that will help you find out about the three types of rocks.
Mineralogy for Kids - This site gives lots of information about the minerals found in the world and in your home.
Crystal Growing Contest - Are you interested in growing a large, single crystal? Here's a competition for you. You can get credit at school for participating...it appears to be a Win-Win