The Perfect Stepping Stone for Approaching Geology. The Mommies Reviews February 16, 2019February 16, 2019Glenda C. The Perfect Stepping Stone for Approaching Geology.Rocks are continually changing in form. All rocks fall into one of three categories, depending on how they were formed. Learn about the different types of rocks and the transformations they undergo by using this free resource from Kids Discover! Rocks are continually changing form.All rocks fall into one of three categories, depending on how they were formed. Learn about the three types of rocks and the many transformations rocks undergo in this fascinating Rock Cycle infographic, perfect for your classroom curriculum Thank you, Glenda, Charlie and David Cates Share on FacebookTweetFollow usSave