Discover what lies beneath our feet in this full-color book for kids ages 7 to 10, chock-full of hands-on STEM activities and real-world connections that engage learners with earth science Everyone knows what a rock is, but do you know what a rock is made of? And how it was made? And what it's good for? Rocks and Minerals With 25 Science Projects for Kids invites kids ages 7 to 10 on a tour of the fascinating world of the geological.