When Ohio State University student Rob Millburn was bothered by missing bricks in the sidewalks around campus, he decided to see if there wasn't some way that he could contribute to their replacement. Not a mason, Millburn instead decided to use his 3D printer to create bricks that could be put in as placeholders until the campus was able to fill in the spots. Since then he has developed quite a following and started a GoFundMe campaign to help defray the costs of printing. Read more at 3DPrint.com: http://3dprint.com/170986/osu-studen...rinted-bricks/