I made a full size one out of foam for last year's Haunted Mine. I just got my real pick axe (we have really rocky soil here) and traced it and then glued it. Though I broke the head off and Hubby had to screw it into place again but it's stil in great condition. Try foam! REALLY cheap! Plus unless yo ulet someone touch it no one will notice what it's made of anyway so might as well be as cheap as possible!