Do you have a kid with an ever-expanding rock collection? Turn their interest into a science-filled afternoon with this easy scratch test experiment from our Klutz Maker Lab Rocks, Gems & Geodes kit! With just some rocks, a penny, and their fingernail, they’ll learn how to measure how hard rocks really are. Print out the instructions below!
Try This Geology Experiment With Your Rock Collector
Junior geologists will learn just how hard rocks are with this simple experiment!
