Just found on Hobby Lobby ‘s web sit 10 pd blocks for $9.59 I gonna check my local store and if they have them they will be mine and just ordered the roller from Amazon. I have a hill street scene with four buildings and yinz guys just solved my street surface problem as I was not sure what I wanted to do with the street surface. Made the grade with 2 inch foam blocks I cut length wise but was not happy with how the street surface was looking with the clay I can mold the top and bottom transitions.