Sedimentary Rock Bars

We're rockin' out in school this month! Little C has been having so much fun telling me everything she has been learning about rocks recently. So, we decided to celebrate with some
Sedimentary Rock Bars...Not only are these super easy (you could really make any kind of layered bar cookie that you like), they teach a great lesson about how Sedimentary Rocks are formed. I made up a little printable for the kiddos that you can download here (or click on the image below).

For our bars, I used a package of Betty Crocker Peanut Butter Cookie Mix and pressed it into the bottom of a 9 x 13 pan. Bake at 325 degrees for 12 minutes. Remove from oven and sprinkle 1 Cup chocolate chips on top. Let melt and carefully spread to evenly distribute over the cookie. Then, I baked up some oatmeal cookies and crumbled them on top. For the top layer, I sprinkled on a mixture of butterscotch chips, white chocolate chips and toffee bits (can you tell I was cleaning out the pantry??!).
As I said before, you can make any type of layered cookie bar then have some fun talking about how sedimentary rocks are formed. Have fun and rock on!