Third grade finished their Earth Unit with a lab about soil. After a discussion about the parts of soil, we used food to learn more about soil layers.  The square of chocolate in the bottom of our cup was bedrock and the Fruit Loops above it represented weathered rock.  Then we added a crushed Graham Cracker for subsoil.  Chocolate pudding became topsoil and a crushed Oreo was humus.  We topped the cup off with leaf litter (green sprinkles).